How to cut into a metal water pipe

Insertion into a water supply pipe, plastic, cast iron, under pressure

Tapping into a water supply pipe may be necessary when:

• Connecting the house to the main water supply networks.
• Installation of metering devices.
• Connecting household appliances (dishwasher, washing machine, additional tap).

Tapping into a main water pipe involves many processes:

• coordination with various authorities;
• obtaining permits;
• excavations;
• measurement and geodetic surveys;
• cutting the water pipeline, inserting adapters, tees, valves.

These operations can only be carried out by licensed services and teams; you cannot do this yourself. Therefore, we will not go into the details of the process.

Increasing the water supply lines inside a house or apartment can be done with your own hands. The proposed insert should be located behind the metering device, but if the house is powered by a well or a well, then in any place.

In modern apartments, various types of plastic pipes are mainly installed. This is due to their low cost, ease of installation, durability and practicality of such systems. It is not difficult to connect additional branches to these:

1. Shut off the water supply to the system.
2. In the right places, use a grinder or pipe cutter to make cuts in the pipe, making room for inserting a tee. It is advisable to place a basin or rag under the work area so that the remaining liquid in the water pipe does not drain onto the floor.
3. Installation of the tee can be done in two ways:

• Installation of the part is similar to a conventional electrical coupling. To do this, the joints are processed with a welding machine. It is not recommended to use a soldering iron, since the section heated by it is difficult to insert into an existing pipe.
• Using collet clamps and press couplings.

4. A valve is installed in the outlet of the tee, which will regulate the water supply to the connected direction.

Now you can open the water supply and use the system.

An insertion into a plastic pipe can be made for one consumer through a tee, or for several through a manifold. It is installed using the same algorithm, but you don’t need to mount it - they are on the device itself. The collector is capable of providing water to several consumers at the same time, while the main pipe remains as intact as possible.

How to cut into heating pipes without welding

Heating systems in apartment buildings have one peculiarity: it is not possible to turn off the heat supply to a local section of the heating system for work. Tapping into heating pipes without welding is used precisely in such cases and requires a certain skill when performing the work.

Not every craftsman is capable of cutting a pipe into a metal heat supply line, without turning off the coolant supply, quickly, correctly and accurately. Errors when tapping into a heating main under pressure and any delay in work promise a large amount of water that inevitably gets inside the room.

It is not recommended to tap into heating pipes without agreement with utility services. If there is still a need to carry out such work on your own, in this case a special fitting will help out.

A heating main installed from plastic pipes also allows you to easily connect a channel for discharging part of the coolant using connecting elements designed for this purpose.

Tapping into heating pipes without turning off the coolant supply is carried out using a saddle with a threaded outlet

The most common method of inserting into a metal heating pipe without welding is to use a special fitting consisting of the following parts:

• a mating flange that fits tightly to the back side of the insert, complemented by clamp-type fastening units;
• fastening unit, with durable clamping screws;
• the upper part of the flange, supplemented by a drain pipe, and in some cases, a ball valve that shuts off the coolant supply.

The main heat supply line will have to be drilled, but this will need to be done only after installing a special fitting in place of the future insertion. Its cost is quite high, but the connection is considered reliable enough to make a safe insertion.

Tapping methods without welding

You can cut into a main pipeline without using welding. This technology is used by many specialists, since welding work requires compliance with safety rules. In this case, special equipment will be required for welding. Welding work is considered complex and time-consuming.

Non-welding tapping technologies include:

• installing a collector is the optimal solution for a large private house. The compact collector system is also installed in the apartment. A water pipe is installed at the entrance of such a system. The collector has several outputs. Their number depends on the system model. The pipeline is connected to any outlet. Adapters are used to fix the hoses;
• installation of a tee - this insertion method is used if a single outlet is provided. The water supply connection is first unscrewed, and then a tee is installed in this place. The pipeline is expanded or shortened by cutting threads;
• the process of cutting the pipe itself - the technique is optimal if there is no external connection. A grinder is used to perform cutting. A tee with a pre-cut thread is installed;
• the use of a thin pipe - a hole is prepared in the system onto which a seal or clamp is fixed. To install the outlet, tightening screws are used.

Features of the tapping process

HDPE channels are found everywhere today. Thanks to modern technologies, inserting into such a pipeline avoids some of the difficulties inherent in highways with metal pipes.

Firstly, it is not always necessary to stop the flow of gas or water, which certainly leads to sharp dissatisfaction among residents who are connected to the system. If the pipeline is connected to an industrial enterprise, its capacity may be reduced. In some institutions (hospitals, maternity hospitals, kindergartens) the lack of water is unacceptable.

Secondly, previously the insertion process involved the installation of a reducing tee, which has considerable dimensions. Particularly labor-intensive (both in terms of money and time) was the transition from the main channel to the local pipe.

Thirdly, there is a need to equip a well or chamber for installation and further maintenance of the shut-off device. Insertion under pressure into a HDPE pipe is often performed by using a special valve, which allows you to completely shut off the flow or regulate it if necessary.

If necessary, you can use tapping technology under pressure, and there is no need to shut off the water

Plastic water pipe

Water supply made from polypropylene pipes

Plastic pipelines are more practical in combination with water and, most importantly, cheaper, so they can increasingly be found in apartments and private houses. Processing of this material is also easier, which also applies to inserting into it, for which special devices are provided to make the task easier.

Let's move on to the answer to the question, how to cut into a plastic water pipe?

Curved flange

You can, of course, cut out part of the pipeline and install a tee in its place, but if the structure is close to the wall, such an operation will be difficult to perform. In addition, it is also undesirable to once again violate the integrity of the pipe. Therefore, let's take a different, more thoughtful path.

To complete this you will need:

Name	Purpose
Pipe section with pipe	During installation it becomes the basis of a curved flange
Drill with crown attachment	Drilling a hole
Adhesive sealant	Sealing joints
Sealant	Seals the connection point of the outlet
Clamps	Tightening and fixing the pipe

Let's get started with the task:

1. We cut the pipe section lengthwise into two parts so that after this it lies evenly on the main pipeline, forming its second wall.
2. We drill a hole using a drill and a crown equal to the diameter of the prepared pipe.

Cutting the required hole

1. We place a plastic blank on the resulting opening.
2. We coat the joints with sealant.
3. We tighten the resulting flange from the back side of the water supply with clamps.
4. We install a rubber seal into the pipe; a cotton wool sleeve may also be suitable.
5. We insert the outlet pipe into the sealed socket.

Saddle

Special clamp for inserting into a plastic pipe with a cross-sectional diagram

The saddle is a device consisting of two clamps and a hole for drilling, after which the tap is inserted into the water pipe. Such a device allows you to complete the task at any pressure level in the pipeline without any special skills. It is enough to pay close attention to the work.

For house connections, saddles with a built-in cutter and valve are also used. They are installed even at pressures reaching 16 bar, using sleeve welding and remain permanent. Their service life is fifty years.

Connection to the central heating system

Example of a connection to central heating

In apartment buildings with central heating, the installation of new polymer pipelines involves one difficult task - inserting into a metal heating pipe. If you choose the wrong materials and installation technology, there is a high probability of depressurization of the joints.

The problem is related to the rapid rusting of pipes due to the possible enrichment of water with oxygen. Therefore, it is not recommended to use cross-linked polyethylene pipes without a special protective sheath.

The technique for inserting into a heating pipe is as follows:

• Turn off the water supply . This must be agreed upon with the management company, providing them with all the necessary documentation for changing the central heating parameters in the apartment;
• Installation of the transition block . It usually includes a filter element, a check valve and a meter;
• Checking the tightness of joints . Injecting water into the heating circuit.

When inserting heating pipelines into existing internal networks, you need to check the throughput of the new section. It must correspond to a similar parameter for the entire network. Otherwise, additional hydraulic load will appear.

Often, such work cannot be done by inserting into the heating without welding. A problem may arise when coordinating the installation scheme with the engineering department of the management company. Experts recommend replacing the riser pipes with plastic ones or welding a metal pipe.

As mentioned above, inserting an additional pump for central heating is prohibited. If it is detected, the owner of the premises may be fined with the mandatory restoration of the previous system parameters.

It must be remembered that any connection to the heating system, regardless of what it is: pipes, pumps, heating elements, will make changes to the parameters of the entire circuit

Therefore, it is important to first perform a preliminary power calculation and select the optimal temperature operating temperature for the heating. And only after that you can choose a scheme for installing new equipment or replacing old one

Source: https://www.tproekt.com/kak-vrezatsa-v-vodoprovodnuu-trubu/

Tapping into a water supply system - three methods for all occasions

https://www..com/watch?v=fH07oAtKsjo

The technology for tapping into the pipeline depends on the type of pipeline material. And since public water supply systems are assembled from galvanized, cast iron or polymer pipes, to complete the information we will have to consider not one, but three tapping technologies at once. So, let's begin.

If polymer reinforcement was used in the construction of the utility main, then tapping into the water supply under pressure will be implemented as follows:

• First, you need to expose the highway by digging a pit with dimensions of 1.5x1.5 meters. Moreover, at first the excavation work is carried out using an excavator. But having reached the metal strip laid on top of the main when laying a public water supply system, the diggers take up shovels, digging out the last 30-50 centimeters by hand. Having exposed the pipe, you can proceed to digging a trench to the house.
• Having finished with the trench, you can move on to arranging the outlet. For this purpose, special collapsible clamps are used - saddles for inserting into the water supply system. They are similar to a tee, the direct-flow pipes of which are disassembled into two halves, and the vertical pipe is equipped with a valve, through which a nozzle is inserted, which drills out the body of the pipeline at the point of installation of the outlet. Both ordinary saddle clamps and saddle clips can be mounted on plastic pipes. But the best option for a saddle for a polymer pipe is a collapsible electric-welded clamp. It is disassembled into two parts, mounted above the insertion point and soldered to the pipe using an electric welding machine. After such manipulations, the saddle is fused into the body of the pipe, ensuring not only a tight, but also a high-strength connection.
• The next step - drilling out the pipe - is performed using a regular drill or a special crown. Moreover, the diameter of the cutting tool should be smaller than the diameter of the upper pipe of the saddle.

The drill is inserted into the pipe only through the shut-off valve, which is closed after “breaking through” the pipe body and removing the cutting tool. In this case, drilling is carried out using a special nozzle that ensures the tightness of the joint. And in some models of electric-welded saddles, a crown-mill is built into the bends, which is rotated with an external collar or an adjustable wrench.

• Finally, all that remains is to insert the pipe of the external branch of the water supply into the trench, connecting it to the shut-off valve using a crimp coupling.

Well, if desired, you can build an inspection well at the installation site. To do this, you need to deepen the bottom of the pit, forming a sand and gravel cushion on it, onto which the shaft rings are lowered (the first one has walls cut for the pipe).

If desired, the pillow can be reinforced with a 10-centimeter pour of concrete grade M150 or M200. The head of the well with the hatch must extend to the zero ground level. This design will make it easier to repair your home plumbing.

After all, the owner will have the opportunity to shut off the system not only using the central valve located in the house.

Tapping into a cast iron water pipe is done a little differently. After all, a metal pipe is much harder than a polymer pipe, but the ductility of this material leaves much to be desired - cast iron can burst at any moment. Therefore, when arranging the tie-in, the following technique is used:

• The pipe is dug out and cleaned of rust at the insertion point. In this case, at the place of the supposed “breakdown”, the top layer of compacted (hardened) cast iron is cut off from the outer surface of the pipe with a grinder .
• Next, install a collapsible saddle on the pipe, and place a rubber seal between the fittings and the clamp. It is he who will ensure the sealing of the joint.
• At the next stage, a shut-off valve is attached to the flange outlet of the saddle, through which a cutting tool - a crown - will be inserted.
• Next, you just need to drill through the body of the cast iron pipe, not forgetting the need to cool the cutting area and change dull bits.

To drill a hole in a cast iron pipe, a special crown with carbide cutting plates is used. Cast iron cannot be cut with any other tool.

• Finally, the crown is removed from the valve and the water flow is stopped. Installation of the external branch of the household water supply, extending from the saddle to the meter, is carried out according to standard rules.

Arranging a manhole above the insertion site is desirable, but not necessary.

In terms of ring rigidity, steel pipes are not inferior to cast iron fittings. But steel is a more ductile iron-carbon alloy than cast iron. Therefore, when inserting into a steel pipe, you can use original technologies that are similar to methods for joining polymer pipes. As a result, the technique for arranging a tie-in into a steel pipeline looks like this:

• The pipe is dug out, cleaned of rust and prepared for welding.
• Next, a threaded or flanged pipe made from “main” fittings is welded (butt-welded) onto the pipe body. However, for the pipe you can choose any type of rolled pipe made of structural steel.

After welding, the seam is checked for leaks by coating the inside with kerosene and outlining the outside with chalk. Oil stains on the outer surface will indicate defects in the seal of the joint.

• At the next stage, a flanged or threaded valve is attached to the pipe.
• Drilling the main pipe is carried out through the valve. Moreover, the upper layers can be passed through with an electric drill, and the last millimeters can be drilled manually.
• Finally, behind the valve, a branch of the external water supply is installed, which is led directly into the house through a pre-opened trench.

In addition, it should be noted that the slope of the outer branch and, accordingly, the saddle pipe should be 2 degrees towards the house. And after assembling the external branch, before installing the water flow meter, it must be checked for leaks. You can dig a trench from the point of connection to the house only after completing a successful pipeline leak test.

Connection to domestic water supply inside the house

Using a tie-in, we can arrange a branch from the main home water supply line, with which you can connect an additional source of consumption or an irrigation system.

If the water supply is supplied from a well, then a tap into the pipe can be installed anywhere. For main water supply, the tie-in can only be installed behind the water consumption meter.

At the same time, the technology for arranging the “internal” tie-in is somewhat different from the method described above. After all, the pressure in the internal network can be turned off at any time by simply closing the central shut-off valve. Therefore, for insertion in this case, you need a regular tee, and the work itself is carried out in the following way:

• You close the central valve and drain the water from the pipes by opening the “lowest” tap.
• Next, you divide the pipeline in the right place, using a pipe cutter or grinder for this purpose. In this case, you need to place a tray under the cut point: after all, some portion of the water will remain in the pipes. In addition, at the same stage it is necessary to cut out a section from the body of the pipeline whose dimensions coincide with the length of the tee.
• The next step is installation of the tee itself. The tee is cut into a plastic pipeline like a regular electrical coupling, soldering the joints with a welding machine. But in this case it is not recommended to use a soldering iron for smooth couplings, due to possible difficulties with installing the fixed pipe onto the heating gauge. However, an alternative is also possible - mounting the tee on collet clamps or press couplings. The tee is cut into steel pipes using a threaded pair, cutting the bend on the body of the water supply pipe with a die. Welding work in this case is not recommended, due to possible difficulties with the formation of a circular seam.
• Finally, you install a shut-off valve in the tee outlet, with which you can shut off the new branch of the water supply. After this, you can open the central valve and use the water supply system.

Installation of a new line is carried out with the water supply running. After all, the outlet of the tee is closed by a separate shut-off valve.

Let's sum it up

As you can see: inserting a pipe is not very difficult. True, the technique of welding installation of a pipe to a steel water supply is available only to professionals. But installing saddles on a polymer or cast iron pipeline will not cause difficulties even for an untrained home craftsman.

As a result, you can cut your home water supply into the main line even with your own hands. Just remember to get permission from utility services and other regulatory organizations. Otherwise, your insertion will be cut off as an illegal connection, and all your efforts will be in vain.

Source: https://grounde.ru/sdelat-vrezku-vodoprovod.html

How is tapping into the main or secondary water supply carried out?

Tapping into a water supply system is carried out in various cases. Tapping into an existing water supply can only be done in special situations. You can’t just cut into communications; to do this you need to get permission, especially when it comes to the state water supply.

Pipe tapping

Pipeline insertion options

The following options exist:

• connection to the main water supply;
• tie-in into a secondary pipeline.

The type of tie-in, pipeline material and other nuances determine how the work will be carried out and what equipment will be used.

The main water supply serves not one apartment or house, but a large area. Such pipelines pass through various areas of the settlement, branches are connected to them, which supply water to each consumer. The main pipes are under high pressure.

It is easier to insert into a secondary water supply pipe, since these pipes are thinner, located close to the surface, and have a plastic casing. When tapping, you should distinguish between pipes that come with high, medium and low pressure.

High pressure pipes have a durable casing. They are made of steel, cast iron or polyethylene - high pressure materials. When working with these structures, safety precautions must be observed. When tapping into a water supply, the liquid will come out under high pressure, which is difficult to shut off using available means. Medium and low pressure pipes are safer. It is easier to enter into such pipelines: they have a thin body, and a breakdown in the communication can be eliminated even with improvised means.

Depending on the type of material, pipes can be made of the following materials:

• cast iron;
• become;
• polyethylene.

Connection to cast iron pipe

Insertion into a cast iron water pipe is carried out using a coupling. Connecting a cast iron pipe to communications requires compliance with the following rules:

1. First, clean the surface of the pipeline in the area where the entry hole will be made from dirt and rust.
2. A rubber seal is fixed on the pipe and a saddle is installed.
3. A shut-off valve is attached to the outlet, and a crown will be installed through it.
4. Drilling is performed with a hammer drill, while the input area is constantly cooled. First, take a drill of small diameter, gradually increasing its thickness.
5. When the crown is removed, the valve is closed.
6. At the end of the work, an anti-corrosion layer and insulation are applied.

We make an insert into the sewer bed in the basement.
When using cast iron, several drill bits must be used. Cutting plates made of hard metal alloys are fixed in them. Overheating of equipment and tools must be eliminated. To do this, the cutting parts of the devices are cooled with water. Cast iron is quite fragile, so you need to drill at low speeds and with little pressure. When an electrical appliance is pulled out of its opening, water may splash onto it.

Therefore, a rubber screen is placed between the equipment and the cartridge. When using a saddle clamp, a rubber seal is used to secure it to the water supply. The clamp can be installed using a hammer drill, which consists of a locking bolt, a flushing tap, a handle and a shaft equipped with a drill. The device has a metal body equipped with a guide sleeve to make work easier.

Insertion into a steel pipe

Steel pipes are characterized by rigidity and ductility. Tapping into a steel water pipe is carried out according to the following rules:

1. First, the surface of the pipeline where the work will be carried out is cleaned of dirt, corrosion and deposits.
2. Fix a clamp to the area for inserting into the water supply under pressure.
3. Weld the seams and check them for leaks.
4. After this, a valve is connected to the pipe, through which a hole is made in the main pipe under pressure.
5. Connect a new pipe branch.
6. The upper section of the main pipe is drilled with a hammer drill, and the remaining small layer of a few millimeters is processed manually.

Stages of the procedure

Stages of insertion into existing networks:

1. Select the insertion method. Installation is performed at an angle of 45 or 90º, the outlet can be directed upward or to the side.
2. Select pipe material with a certain diameter.
3. If the work will be carried out without turning off the water, then use a saddle clamp.
4. Prepare tools: shovel, hammer drill, milling cutter, grinder, emery, crown.
5. Excavation work is carried out. They are digging a pit to get to the main water supply.

All actions with pipes under pressure require compliance with safety precautions and the implementation of these stages of work.

Defining the cut-in area

Before starting work, it is necessary to determine the need for insertion and the location of the system. The main pipe must run in a straight line. When calculating the depth of the water pipeline, it is necessary to take into account the level of freezing of pipes in a given region. In the middle zone, this figure is 1.2-1.5 m. You should also know what other communications are available on the territory so as not to damage them.

Performing a diversion from the highway

This work is performed by tapping into a pipe under pressure. The hole is drilled using a hammer drill. At the end of the work, the external line is laid in a trench and connected to the valve using a coupling.

When branching a water line from the main, the beginning of the new pipeline should be at the clamp valve, and its end at the water flow meter. The meter must be located between the shut-off valves.

If the entry into the pipeline requires the outlet to pass through the wall, then during work it is necessary to provide a gap of 0.2 m. After completion of the work, this gap must be sealed with a waterproof gland, which is covered with cement on top.

System adjustment and testing

Since the insertion took place under water pressure, after the work it is necessary to check the correct joining of all elements of the system.
To do this, pressurized water is supplied to the new line. The air formed in the system is removed through a tap at the other end of the pipeline. If all connections are sealed and strong, then the trench is buried. 5-2 Insertion of cold water into the city water supply network

Permitting documents

Before starting work, you must obtain permission to tie in. If the tie-in is carried out without the approval of the relevant authorities, this may result in a fine. To enter into the main water supply, you must obtain permission. We need technical specifications, a plan of the area where the work will take place, information about the location of the branch connection, and the diameter of the main pipeline.

First you need to contact Central Vodokanal. Then order the designers to carry out design and estimate work. With these papers you need to go to the SES to formalize the project. Then they write an application to issue permission to tie into the main system.

The work must be carried out by professionals. There are times when tapping is prohibited. This happens if you connected to the line without installing a meter, the diameter of the branch branch is larger than that of the main line, or there is no connection to the centralized sewerage system.

Source: https://trubyda.ru/vodoprovodnye/kak-osushhestvlyaetsya-vrezka-v-sushhestvuyushhij-magistralnyj-ili-vtorostepennyj-vodoprovod

How to cut into a plastic water pipe under pressure, without welding and with your own hands

Hello dear reader! The topic of today's conversation will be plastic pipes. They have already become widespread and home craftsmen often face the question: how to cut into a plastic water pipe? In this article you will learn the most accessible and effective insertion methods, its step-by-step algorithm, nuances, and professional advice on how to avoid mistakes during this operation.

When is this kind of work needed?

The need for such work arises when:

• pipe replacement;
• installation of a water meter, additional plumbing;
• connecting the washing machine drain;
• changing the location of kitchens, baths, toilets;
• other similar situations.

Purpose of the procedure

The purpose of the procedure is to connect the branch to the main pipe or main.

New wiring needs to be done inside the house.

Connection to a common pipeline occurs during the construction of an individual house or other capital construction project, or when organizing a diversion to another direction. At the same time, water intake is calculated, the diameter and material of secondary pipes are selected. Outlet pipes are selected based on the pressure values ​​in the main line.

The essence of the process

To connect the outlet to the main pipe, you need to drill a hole in it and attach the outlet pipe using soldering or various types of fittings.

If it is impossible to turn off the water supply, the hole and connection are made using special clamps.

During the operation, two general conditions must be met:

• the diameter of the drill and the diameter inside the outlet pipe must match;
• The additional pipe is smaller in diameter than the main one.

What documents are required for tapping into the main water supply?

It is forbidden to make a connection to a common water supply main without the permission of local authorities. This will entail penalties and administrative liability.

• To connect to a common main water supply, the owner of the household must obtain permission from the department in charge of the pipeline.
• An application is submitted to the local water utility authority, accompanied by documents confirming the rights to the land plot and house, as well as a cadastral plan of the site.
• Vodokanal specialists will prepare technical specifications indicating the volume of water intake permitted for the applicant and the location of connection.
• After this, it is necessary to obtain a conclusion from the regional SES for connection to the water supply network.
• A topographic survey in the form of a drawing with all the necessary information about the site, the objects built on it, including underground ones, indicating the location of the water intake well, will be done by cadastral engineers.
• A water supply project for a house is ordered from the design department of the water utility.
• The utility services issue a warrant for excavation work.

Only representatives of the water utility have the right to make connections into a common plastic, steel or cast iron pipeline.

After connecting to the main line, the SES takes samples and checks the quality of the water, draws up a certificate of washing and disinfection.

The water management service accepts the work and issues a certificate of compliance with technical conditions. Concludes an agreement with the owner of the property on the operation of the water supply pipeline.

Inset options

According to their technology, methods of inserting into plastic pipelines are divided into two conditional groups.

The first method is to secure the crimping lining to the pipe with bolts or welding with heating elements built into the lining.

In the second option, connections are made using welding using a special apparatus or using fittings of various types.

Let's look at existing methods for connecting branches.

Using a crimp clamp

Such a clamp consists of upper and lower linings that match the dimensions of the pipeline.

A rubber sealing part with a hole is placed on the pipe. Its function is to prevent leakage. Next, the linings are installed on the gasket at the top and bottom of the pipe, tightened with bolts and nuts.

The pipe is drilled through the hole in the outlet pipe located in the top cover. Then a tap is connected to it.

Connecting a tee or manifold

Tee insertion is considered a classic insertion option. The essence of the operation is that a part of the pipeline is cut out, and a tee or manifold is installed in its place. An outlet pipe is connected to them (if the collector has several outlets at once).

Connections to the pipeline are made by welding using a special apparatus or using fittings of various types.

Electric welded saddle

A regular saddle pad is a crimp clamp pad that we have already discussed.

Unlike inserting a tee, it does not involve cutting the pipe product, thereby not violating its integrity. To create a branch, it is enough to drill a hole of the proper size in the main pipe.

The design principle of an electric welded saddle is no different from a conventional one, but it is equipped with heating coils built into its body. When connected to the electrical network, these elements heat the plastic, the parts of which are welded and form an inextricable connection.

Electric welding saddles equipped with a cutter allow you to perform a plunge operation without shutting off the water in the pipeline.

The working process is to install the upper and lower parts of the cover on the pipe. Electrical power is supplied to the saddle, causing parts of the lining to be glued to the pipe. After the material has hardened, drill a hole of the required size by turning the built-in cutter. Then all that remains is to connect the outlet.

Insertion using a pipe

Tapping using a branch pipe is used in secondary areas, in low-pressure pipes, for example, a sewerage pipeline. This method is good because it does not require cutting the pipeline and can be done without welding.

The pipe should be in the form of a clamp with a girth that would be enough for the entire diameter of the riser.

1. Mark the location for the pipe.
2. Drill a hole with a crown, the size corresponding to the diameter of the pipe.
3. Secure the pipe by tightening the ends of the clamp with a screw and nut.
4. A rubber seal is inserted into the pipe, and an outlet pipe is inserted through it.

You can use an adapter for pipes that are significantly smaller in diameter than the main one.

Considering that there is no high pressure in the sewerage system, such a connection will last a long time and reliably.

Which way is better

Inserting a tee using welding with a special apparatus is considered the classic and most reliable method. Another thing is that it is not always physically accessible due to lack of space for work. Therefore, various types of crimp pads are used.

Electric-welded saddles with built-in heating elements and a cutter for drilling have proven to be easy to install and simple in technology. They can be successfully used by people who do not have repair skills.

Do it yourself or call a professional

If the work is carried out inside the house, with domestic water supply, then there is little point in inviting a specialist. If difficulties arise with the welding machine, you can use an electric welding saddle equipped with a cutter.

But when connecting a water supply to a public main, you cannot do without professionals who have the appropriate clearance.

Approximate cost of work

Connecting a private household to the main water supply network is the most labor-intensive and financially expensive process. The cost of work depends on the distance to the well, the volume of excavation work, and the price level for services in the region.

The approximate figures are as follows:

• obtaining technical specifications and other documents, approval – 22 thousand rubles;
• costs for pipes and other network elements – 9-10 thousand;
• fee for connection to the central network and work on inserting into the highway - from 20 to 50 thousand;
• earthworks – up to 10 thousand;
• complex work on laying a network - 2-2.5 thousand per 1 meter.

Thus, the total cost can range from 80 to 115 thousand rubles.

Do-it-yourself insertion

To carry out independent work on inserting into a plastic water supply system inside the house, it is necessary to outline a general plan of work, purchase materials, and prepare tools. Materials should be purchased after determining the required dimensions.

Equipment such as a welding machine may come in handy once every few years. It makes sense to borrow it from friends or rent it.

Required tools and materials

Materials you will need:

• polyethylene pipes (HDPE);
• tee of the appropriate size.

The set of tools will consist of:

• soldering iron;
• pipe cutter;
• construction pencil.

Work progress

It is necessary to embed the tee into the plastic riser.

As a rule, risers are located close to the wall. Therefore, for ease of installation, the embedded unit is assembled in advance. It consists of a tee, an outlet and a shut-off valve installed on it - a valve.

The assembled assembly is applied to the pipeline, the cutout area is measured, and the cut locations are marked.

Turn off the water, open the water tap and completely drain the remaining water from the system.

Using pipe cutters, cut out the intended area.

The assembly is installed using an electric soldering iron for plastic. For PVC pipes, you can use glue.

Pipes are often located close to walls. There may be problems using the soldering iron. In this case, push-in fittings or press couplings are used.

Here you can watch an excellent video to understand all the nuances:

Expert advice

Electric welding saddles have successfully proven themselves for inserting into polymer pipes. Their use facilitates the work process and ultimately results in a high-strength connection.

It is recommended to immediately set the soldering iron temperature regulator to 260 degrees and not change it in the future.

If you do not have the skills to use a soldering iron, it is better to first get practical experience on pipe sections.

The nuances of tapping into a water supply system under pressure

To cut into the pressure pipeline, clamps-plates or electric welding saddles equipped with a cutter built inside the lining are used. It is located in a hermetically sealed housing and when drilling, splashes of water do not interfere with the process.

The cover is welded to the pipe, and shut-off valves are installed. A hex wrench is used for drilling. After the process is completed, the cutter is removed and the pipe in the plate is closed with a threaded cap.

Liners with an internal cutter can be used in any water supply system, including those under pressure. However, their cost is higher than that of conventional overlays.

How to make a tap into a main water supply

At a summer cottage, a situation may arise when you have to connect to the common cooperative pipeline yourself. An electric-welded saddle clamp is used here. It is applicable for lines with a pressure not exceeding 1.6 MPa.

The work will be greatly facilitated by the presence of a built-in cutter in the sealed body of the saddle and the equipping of the lining with a valve.

Common mistakes

When preparing for an operation, it is important to accurately select the tee, fittings, linings, and outlet pipes exactly in size.

To speed up the heating of the plastic, the soldering iron temperature should not exceed 260 degrees. This results in damage to the material.

Carrying out work at air temperatures below 5 degrees reduces the efficiency of heating parts. There is a need to increase the operating temperature of the device, which causes deformation of the elements.

We hope, dear reader, that the article was useful to you. Good luck in your renovation business, subscribe to our articles and share your experience on social networks.

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Source: https://vseotrube.ru/vodosnabzhenie/kak-vrezatsya-v-plastikovyj-vodoprovod

How to insert into a water pipe - options for different materials

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Often there is a need to expand the existing water supply system, which allows you to add new plumbing equipment to your home or extend the circuit to other rooms. The article will discuss how tapping into a water pipe is carried out, what rules must be followed, etc.

Coordination of work on tapping into the water supply system

Only with the permission of the relevant authorities can work begin on inserting an additional pipeline into the centralized water supply system. It is important to complete all documentation before starting work. If all this is not done, then you may incur administrative and financial liability for the illegality of your actions.

So, you need to start the insertion procedure in order to obtain a plan of a specific site to determine the presence of various utilities laid underground. With this document, you can go to the water utility and make a statement about your desire to connect to the central water supply system. You must also have with you documents indicating ownership of a specific house or plot.

Technical parameters that you need to know about when connecting:

• strictly defined insertion point;
• diameter of the connected pipeline;
• other information required in accordance with the purpose of the work performed.

Then you need to obtain permission from the sanitary and epidemiological service. With all the above documents, you can begin to develop and sign the project and estimate for the work being carried out. Independently tapping into a pipe without turning off the water supply is strictly prohibited, as is installing metering equipment. For these purposes, there are specialists who can be called from the appropriate government or certified private organization.

It is also prohibited to insert into the following types of pipeline:

• large diameter trunk networks;
• pipelines that are subsequently not connected to the sewer drain;
• other types.

Basics of tie-in

The determining factor when choosing the method by which the insertion will be made is the material used in the production of the central pipeline. Usually it is plastic, metal, metal-plastic, or less commonly found cast iron. Naturally, insertion is impossible without making a hole of the appropriate diameter, which means that when it is created, water will flow out of the pipeline. Only with the help of special clamp systems can everything be done with high quality.

A couple of basic rules for doing a sidebar:

1. The internal diameter of the pipe that will connect to the larger pipeline must be equal to the diameter of the drill used.
2. The outer diameter of the pipe should be slightly smaller than the hole into which it will be inserted.

The type of water supply affects how the insertion will be made. Most often we are talking about the use of welding and special clamps that allow work without draining water in the system. Clamps are also needed in cases where cutting the line is not at all possible. When working with polyethylene pipes, welding machines cannot be used.

When using welding, the water from the system will definitely have to be drained, and the inserted pipe must end with a coupling or thread for installing a root tap.

Sequence of insertion

The main device for carrying out the work will be a specialized drill, which allows you to drill a hole of the required diameter in a pipeline filled with water. By following safety precautions and rules for working with the tool, you can achieve increased productivity of this device.

Initially, you need to remove the insulating materials and clean the pipe in the place where the tap will be made. Then you need to install a flange with an outlet to the main pipeline. It is fixed with a clamp. It is necessary to install our tool on the valve that closes the flange. If you are cutting into a steel pipe, you should not use a clamp, but a pre-welded pipe.

When work with the welding machine is completed, it is necessary to check the resulting seam for defects. If there are any, then you can go over the contour of the seam again to make it as reliable as possible.

When the coupling (pipe) is ready, you need to insert a cutter of a certain diameter and cut a hole for inserting the pipe. The equipment is then removed and the valve blocks the flow of water in the coupling. Once the embedded pipe is welded, the insulation and anti-corrosion coating can be restored. In this sequence you can work with cast iron and metal pipes.

Existing types of clamps

Today, the construction market offers several types of clamps that can be used for insertion:

• clip - cannot be used when it comes to embedding a valve into a pipe under pressure, but for a cleaned system it is ideal due to its simplicity of design and low cost. It can be found in both metal and plastic versions;
• saddle - when working under pressure on asbestos-cement, metal or plastic pipelines, you need to use this type of clamp. The flow of water will be blocked by a special locking plate;
• drilling - as one of the structural elements of this product, a rotating bolt mechanism is used, which remains on the pipe as a shut-off or control valve;
• Electric welded saddle clamp is suitable for working with plastic pipes. It is initially supplied with a milling cutter of the required diameter. To install it you will have to use additional tools.

The polyethylene pipe is inserted into the water supply using the last two types of clamps.

Connection to the main pipeline

When working with a main pipeline in which it is not possible to drain water, you must proceed as follows:

1. First, get to the insertion site by digging out a significant layer of soil.
2. Make a cut.
3. Completely install the water supply circuit from the embedded element to plumbing fixtures or other objects.

Excavation work usually involves digging a pit of 150x150 centimeters. It is important to ensure that the bottom of the pit is slightly lower than the pipe (about 50 centimeters). Work can be carried out using an excavator, but no more than to a depth of 30-50 centimeters from the pipe itself, and then shovels are used. The location of the insertion point in the well greatly simplifies the work.

Source: https://trubaspec.com/vodoprovod-i-vodostok/kak-vypolnyaetsya-vrezka-v-trubu-vodoprovoda-varianty-dlya-raznykh-materialov.html

How to crash into a water pipe

There are often cases when there is a need to expand the water supply system in order to be able to install plumbing equipment. This may also be due to the need to install an additional circuit. In any case, such actions must be correlated not only with safety precautions, but also with a certain procedure for carrying out work. In this article you will learn how to cut into a water pipe.

Tapping into a water main

The characteristics of the main water pipeline are the following: such a pipeline is laid on the main streets, pipes with a diameter of 100 to 2000 mm are used. To carry out the insertion, you need to turn to one of two possible options for performing this task:

• welding - the thread necessary for installing the tap is welded, which is used to connect the pipe going to a specific house;
• overhead clamp - used when there is no possibility of blocking the flow of water.

The depth of the highway determines the insertion location. If the main pipe is at a decent depth, then the insertion is made in its upper part, and otherwise - with a tap to the side. Let's take a closer look at the options mentioned.

Welding method

When using this method, it is advisable to first turn off the water supply and then proceed to the direct tapping. To do this, you will need to burn a hole in accordance with the diameter of the thread, which then needs to be welded.

However, the process of such work does not always look exactly like this. In some cases, tapping into a water pipe is carried out without shutting off the water supply. This can be explained by the elementary lack of shut-off valves or by the fact that such fittings exist, but they are old, which does not allow them to be used for their intended purpose. In practice, the following set of actions is assumed:

• the insertion location is selected, where the thread is welded;
• then the full bore valve is screwed on;
• a hole is drilled through an installed tap, ensuring that the hammer drill is protected from water by a rubber or cardboard screen;
• At the end of the previous process, the drill bit is sharply pulled out and the tap is closed.

Drilling should be done at high speeds, as this reduces the likelihood that the drill will jam. This tapping method is problematic, which is caused by high water pressure in the main water supply. If the pressure exceeds 5 atm, then it is necessary to refuse to carry out such work independently. In this case, you should turn to specialized organizations rather than take the initiative.

Overhead clamp

The option of using an overhead clamp if it is necessary to insert into the main line is quite suitable when working with pipes made of different materials: steel, polypropylene, polyethylene, etc.

In practice, such a sidebar has the following procedure:

• the water is turned off;
• the overhead clamp is attached to the pipe, taking into account that this installation element must be one size larger than the pipe;
• a sealant, usually made of rubber or silicone, is placed under the clamp, which is necessary to ensure the tightness of the connection;
• the thread is attached to the clamp by welding;
• the crane is installed;
• water is supplied.

In the same way, tapping into a water pipe is made without turning off the water, but only if the pressure does not exceed 5 atm. This method is more suitable when working with polyethylene pipes - a simpler drilling process.

When the material used to make the pipe and clamp is metal, there is no need to fix the clamp. As for the polyethylene pipe, this is not the case, which is explained by the presence of a large linear expansion of this product.

This forces the use of epoxy glue to seat the clamp.

Insertion on a secondary section of the water pipeline

So-called secondary pipelines branch off from any central highway, supplying water to neighboring streets. The pipes of such distributions are predominantly polyethylene; they have a smaller diameter - on average 50 mm. Typically, taps are installed at branch points of secondary pipelines, closing which simplifies the work of inserting pipes, which is available in two ways.

First:

1. A 2 meter long trench is dug along the pipeline. This implementation of the problem is used mainly in relation to small diameter pipes (up to 50 mm).
2. The pipe is being cut.
3. A tee is mounted on the pipe, which can be welded if the pipe is metal, or simply fastened with union nuts if it is polyethylene, for example.

Second:

1. An overhead clamp is installed, factory samples of which are equipped with the threads necessary for installing the taps.
2. The tap is screwed on.
3. A hole is drilled, which is done directly through the tap. This can be done without shutting off the water supply, since secondary pipelines are characterized by low pressure pressure.

If possible, it is necessary to install a well in the place where the insertion is made. For this, a concrete ring or a used brick as a base is suitable, followed by closing the structure with a lid with a built-in hatch.

Insertion into a metal water pipe

When working with a metal pipeline, it is advisable to use a saddle clamp, which has several varieties. Immediately before installing the clamp, the pipe must be put in order, that is, it must be cleaned of dirt and rust, if any. The saddle clamp design consists of two semi-circular parts, a bolted connection and a shut-off valve that has a hole that is designed for drilling.

[important]The tight fit of the clamp to the water supply is ensured by special rubber seals that guarantee the tightness of such a connection.[/important]

Procedure for tapping into the pipeline:

• secure the clamp to the surface of the pipe;
• drill a hole;
• install the plug in the form of a screw intended for this purpose.

It is also possible to use a clamp supplemented with a valve. Here the procedure is the same: a hole is made, the drill is removed and the valve is closed.

Along with this, there is a tapping machine, consisting of a handle, a locking bolt, a drill mounted on a shaft, and a flushing tap. All these elements are located inside a metal case, attached to a clamp using a rubber seal. The use of this device makes it possible to make comfortable insertion into pipes.

Insertion into cast iron water supply

Drilling of cast iron pipes, which are part of a pipeline that pumps water under pressure, is carried out using special clamps. These products differ in some design features and the use of bimetallic crowns. Such an insertion should take into account certain nuances:

• cast iron is fragile, so when drilling it is necessary to apply a small degree of pressure;
• Before carrying out work, the layer applied to prevent corrosion should be removed from the pipe;
• drilling should be done at low speeds;
• Excessive heating of the crowns should not be allowed.

When the compacted layer is removed, it is necessary to install a collapsible saddle where the insertion is supposed to be carried out. In this case, it is necessary to seal the joint with rubber pads. The drilling process itself is carried out using a carbide bit.

Tapping into a cast iron pipe is based on the following steps:

• unearth the pipe and free it from rust at the site of the intended insertion;
• remove the top layer, which is hot cast iron, using a grinder;
• install a saddle with the obligatory sealing of the joint between the clamp and the reinforcement using a rubber lining;
• mount the valve on the flange outlet and start drilling using a bimetallic bit;
• drill the pipe, not forgetting to cool the cut site;
• remove the crown from the valve;
• turn off the water.

When cutting into a cast iron pipe, remember that the saddle pipe must be installed so that its slope towards the house is 2 degrees.

Insertion into a plastic water supply

The saddle clamp makes it possible to insert plastic pipes into a water supply system without reducing pressure. Such a clamp is made from appropriate plastic, and its equipment includes a drilling mechanism and a heating coil. To ensure welding accuracy, there is a special bar code printed on the clamp body. This tapping method is used for pipelines operating at pressures up to 1.6 MPa.

[warning]The service life of a saddle clamp can be up to 50 years, as it is resistant to corrosion.[/warning]

Before inserting, the pipe is thoroughly cleaned, and then a clamp is attached to it, which has terminals that allow you to connect a welding machine, which makes it possible to weld the bend by heating the spiral. A saddle equipped with a cutter and valve is also used:

• a coupling is used that allows insertion by welding;
• After the cutter has cooled, a hole is made and a valve is installed.

Installing a pipe to a water pipe using welding is a job for professionals. In this case, you can independently install saddles on pipes made of cast iron and polymers, if the water supply is first turned off. When tapping into a water pipe under pressure is made, existing safety rules governing this type of work should be followed.

The cost of tapping into a water supply system

The price tag for a polymer clamp is 100–250 rubles. In this case, a fitting installed on a pipe with a diameter of 32 mm will cost 100 rubles, and for 75 mm fittings – 250 rubles.

The cost of a stainless steel clamp, complemented by a flange outlet, is 9–10.5 thousand rubles. The delivery set of this equipment includes a rubber gasket and 6 studs that provide the ability to fix the staples.

Electric welded saddles produced by the Italian company Eurostandard Spa, having a diameter of 40–250 mm, can be purchased for 25–80 euros. As for the cost of work, the average price tag for services of this type ranges from 2 thousand to 2.5 thousand rubles.

Source: https://VseProTruby.ru/vodoprovodnye/vrezka-v-trubu.html

Correct insertion into a water pipe

Before draining from the internal or external water supply, it is necessary to purchase auxiliary parts and tools. Their selection is made taking into account the type of pipes from which the water supply is laid. This takes into account the operating pressure in the system.

The need to tie into the system inside a facility or on site arises when connecting an external tap, plumbing equipment and household appliances to the network. The procedure for cutting into the main network is carried out in order to connect a new facility to the water supply.

The principle of tapping into the system
Welding work
Installation of a branch pipe without blocking the main
Step-by-step tapping into an internal network Tapping
methods without welding
Arrangement of a plastic network
Tapping into a water supply system from metal pipes

The principle of insertion into the system

Before starting installation work, it is recommended to coordinate it with the water utility and local administration. If there is no central sewerage system on the land plot, tapping may be prohibited. But if there is a septic tank and all established sanitary standards, it is possible to obtain such permission.

To connect the pipes, a special well is equipped. If the water utility prohibits tapping into an existing water supply system, then the facility is connected to a nearby well. But it must be in working order.

The process of inserting into an external highway is carried out using the following technologies:

• using fittings that are installed on the pipe during the installation process;
• fixing the outlet branch of the system if there is no pressure in the system;
• the use of a shaped part that is fixed to the pipe. Such a connection does not require first turning off the water supply to the system.

 Welding work

Experts believe that the easiest way to insert into a steel external network is welding. A prerequisite for insertion is the ability to turn off the water supply to the system.

An autogenous tool is used to make a hole of a suitable diameter. Then the pipe is welded and the valve is mounted. The last element of the system is covered during further work. If the tapping is completed, the anti-corrosion protection will need to be restored.

If the pipeline is laid from polyethylene pipes, then welding work is not carried out. Taking into account the diameter of the consumable, the clamp is fixed.

Installation of a drain pipe without blocking the main line

Tapping technology without changing pressure is an efficient and productive technique. But before you do it, you need to consider:

• dismantling insulation and protecting the surface in the area where the pipe is drilled. In this case, the diameter of the material with which water will be drained is less than the parameters of the main pipe;
• fixation of additional network elements. A valve with a device for making holes is fixed to the flange;
• if a steel product is used, then the clamp is replaced with a pipe that is welded. A valve with a cutter is attached to it. The completed seam is additionally welded;
• At the next stage, a cutter of the required size is installed. If the hole is ready, the cutter is removed;
• closing the valve. If the insertion is completed, it is necessary to restore the anti-corrosion coating and insulate the pipes.

Step-by-step introduction to the internal network

If it is necessary to cut into an old steel pipeline, then the main method is to arrange a branch by welding a tee. This will require a large amount of work.

If a pipe made of plastic or its derivatives is connected to the main line, then you will need to cut out a section of the pipe taking into account the size of the tee being mounted. But when performing such work, inconvenience arises due to the close distance between the network and the wall of the building.

A simpler method of installing a branch is to insert a pipe with a curved flange. A consumable with a pipe whose diameter corresponds to the pipeline dimensions is preliminarily rejected. The section is cut lengthwise so that its part with the pipe fits tightly onto the pipeline as its other wall.

The previous blank is placed on the pipe with the hole. The fixation site is treated with sealant. The resulting flange is tightened with 2 clamps on the sides relative to the pipe. Subsequently, the remaining part of the network is fixed to the pipe.

On the modern plumbing market you can buy adapters, special saddles and other devices with which the insertion is made (regardless of the conditions for laying the network).

If a saddle is used, the pressure in the system does not change. A saddle is a clamp made of 2 parts. Using bolts, these parts tightly compress the consumable on both sides. The tap is fixed to the saddle using a special connection.

If the diameter of the hole is no more than 1/3 of the diameter of the pipe, then it is drilled with a special device. He joins the tap in time. If the hole is ready, the tap is closed and the device is dismantled. An outlet pipe is mounted to the installed tap.

To connect the house, a saddle with a valve and a built-in cutter is used. For its installation you will need sleeve welding. A similar product is used for pipelines whose pressure does not exceed 16 bar. During installation, the line is not blocked, and when drilling pipes there is no leakage and no chips are formed. The connection does not corrode and has been in use for more than 50 years.

Construction of plastic and metal networks

To enter the plastic system you will need a piece of consumable material and a pipe of the appropriate diameter. At its end, 1/2 of the pipe is retained, due to which the function of closing the insertion points is performed.

A hole is made in the line with the diameter of the pipe. It is treated with sealant. The flange is mounted on the pipe and tightened on the sides with clamps until the sealing substance comes out. Its remains are removed immediately. If the above work is performed in a low-pressure system, clamps are not used. To secure the flange you will need wide electrical tape.

Insertion into a water supply system made of metal pipes

• the flange is made independently from a pipe, the internal diameter of which coincides with the diameter of the laid line. Compliance with this condition will ensure the necessary tightness for the entire system;
• You can use a tee with the required diameter. To do this, a part of the pipeline without a pipe is removed from the part.

  Then the consumable is cut and a hole is made. To fix the pipeline, welding or a pipe is used;

• experts advise welding the flange to the pipeline. Welding work is performed along the entire perimeter of the product. The welding technique can be replaced with sealant and clamp.

Using a special device, holes are made in consumables under pressure. The principle of the method under consideration:

• removal of insulation;
• cleaning the pipe surface.
• installing a flange on the supply pipeline and then securing it with a clamp;
• connecting the valve to the flange;
• installation of a drilling device;
• insertion of the cutter through the valve;
• hole cutting;
• removal of drilling equipment;
• shutting off the water supply from the pipe.

Using the technology described above, it is possible to insert into a steel pipe without welding. This technique is somewhat different from the technology of inserting into a polypropylene product without using welding.

Therefore, before starting installation work, it is recommended to determine the type of consumables used. It is calculated with a reserve. Upon completion of work, the system is checked for leaks. If it is violated, additional repair work is carried out.

They can be done independently or with the help of specialists. If the system is sealed, the line is ready for use.

Source: https://vodoprovodnaya.ru/trubyi-dlya-vodoprovoda/vrezka-v-trubu-vodoprovoda