How to cut into a plastic water pipe. Clamp for tapping into water supply: recommendations for selection and use. Using a tie-in with clamps

There is often a need to expand existing system water supply, 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 on inserting an additional pipeline into centralized system water supply 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 engineering communications, laid underground. With this document you can go to the water utility and make a statement about your desire to connect to central system water supply 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. Self-execution tapping into a pipe without turning off the water supply is strictly prohibited, as is the installation of 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 observing 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 steel pipe, then you need to use not 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 butterfly valve mechanism is used, which remains on the pipe as a shut-off or control valve;
• electric welded saddle clamp 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.

When working with plastic pipelines, it is permissible to use single saddle clamps or a combination such as a saddle-clip.

Polymer materials are best processed using an electric-welded collapsible clamp. Two parts of this design are mounted clearly at the insertion site, then soldered to the pipe. Such a connection has increased strength and absolute tightness.

The process is completed by diverting the side pipe from the clamp valve to the flow meter installed in the house.

Inspection well above the insertion point

Naturally, the location of the tie-in must be under the control of the owner of the house/site, because there is a risk of deformation of the connection, which will require prompt intervention. For these purposes, a special well (caisson) is created above the treated area. Work begins with the pit being deepened by 50-70 centimeters. The created depression is filled with gravel to a depth of about 20 centimeters, then roofing material is rolled out onto it and poured concrete screed layer of 10 centimeters. It is imperative to reinforce this layer using a reinforcement grid.

Concrete gains optimal strength (about 70%) in 3-4 days. Then over concrete slab a block mine is being constructed. Usually we are talking about a round or square shape.

A cast plate is placed on top of the shaft on the neck part, in which a round hole is made. Subsequently, a hatch will be installed in this place. The outer part of the shaft is coated with an insulating compound and filled with soil that was selected from the pit earlier.

On construction work installing a well requires significantly more time, effort and cash than when inserting through a caisson of a water pipeline. Getting to the underground part of the main canal is much more difficult.

Metal pipes and connections to them

When it comes to how to crash into water pipe made of metal, then a saddle clamp with drilling comes to the aid of the worker. There are several structural varieties of this element. Before installing it on the pipe, you need to clean the selected area from corrosion damage and various contaminants. In addition to the standard semicircle, which is present in each clamp, in the upper part of the structure there is shut-off valve. There is a hole made in it through which drilling will be done. A suitable drill bit is also provided. The two parts of the structure are placed on the pipe by fastening them together using conventional bolts.

A special machine assembled from the following elements can be installed on a metal clamp:

• handle with ratchet;
• locking bolt;
• shaft with drill;
• flushing tap.

Each element is presented in a metal case connected to the device through rubber seals. The guide sleeve in the design allows for directional drilling.

Working with cast iron pipelines

A cast iron pipe can be drilled under pressure using special clamps with bimetallic crowns.

Important to know following features of this process:

• cast iron is extremely brittle material, which requires caution from the employee;
• before drilling a pipe, you need to clean it from the anti-corrosion coating;
• it is unacceptable to overheat the crown on the clamp;
• the equipment should operate at low speeds.

After the stripping is completed, it is necessary to install a collapsible type saddle in place of the insertion. This place must be sealed with rubber pads. The pipe itself is drilled with a carbide crown, which simply cannot be replaced during the procedure.

The insertion sequence is as follows:

1. The pipe is excavated and cleaned in the right place.
2. The top layer of hot cast iron is cut using a grinder.
3. A removable saddle is mounted. The joint between the reinforcement and the clamp is sealed using a rubber seal.
4. The shut-off valve is then attached to the flange elbow required for insertion of the crown.
5. The pipe is drilled with constant cooling of the cutting site.
6. The crown is removed, and the water is shut off with a valve.

We must not forget about maintaining a constant slope of the embedded pipe towards the house. We are talking about a value of 2 degrees.

Plastic pipelines and features of insertion into them

It is very important to talk about how to properly cut into a plastic water pipe. You can work with such a pipeline without reducing pressure if you use an electric-welded saddle clamp. This clamp is made of heat-resistant plastic and is also equipped with a special heating coil and drill. Thus, it is achieved optimal temperature, necessary for working with polymers (read: ""). We are talking about pipelines whose pressure does not exceed 15.7 atmospheres. In terms of strength and other characteristics, the clamp used is in many ways not inferior to the polymer pipes themselves. The product is resistant to corrosion and its service life can reach 50 years.

Cut-in sequence:

1. The pipe is cleaned.
2. The clamp is secured with bolts. On this element There are terminals through which the welding machine will be connected.
3. The welding machine heats the spiral with which the outlet will be welded.

Often a clamp is used, which initially has a cutter and shut-off valve built into it. The job is to attach a coupling to the pipeline, and then, after cooling, drill a hole, closing it with a shut-off valve.

Bottom line

From all of the above, several conclusions can be drawn. Only a professional can weld a pipe to a steel water pipe. The saddle can be installed on cast iron or polymer products with your own hands, but only when the water in the system is completely drained. When working under pressure, you must take into account all the rules and recommendations given in this article. It is best to entrust any of the methods to a specialist to eliminate possible risks.

Do you have plastic communication systems in your private home and do they require modernization or repair? It’s not difficult to install plastic yourself, thanks to the features of this material, right? But how can you cut into a plastic pipe if it is under pressure? And is it possible to do this yourself?

We will give you answers to your questions. Here we consider several ways to organize a diversion from an existing highway. Inset options are provided detailed description process and supplemented with photos, which will allow you to understand the intricacies of the technology for installing cheap and durable plastic pipes.

There are different types of plastic pipelines. Some are used to supply water, others to drain it.

There are highways public use, but there are personal intra-house and intra-apartment networks. And each option has its own nuances of performing the work.

To insert a central water supply or village sewer into a street pipe, permission is required from the owner of the networks to carry out such activities without permission. installation work forbidden

In order to crash into the general centralized system and not get into trouble with the law, it is necessary to undergo preliminary approvals. It is best to delegate the signing of all the necessary papers and the insertion work itself to a specialized organization. This will make life much easier.

But no one is stopping you from cutting into a plastic pipeline inside an apartment or private house. This can be done almost anywhere. You just need to follow the basic rules and not overload the system with an abundance of plumbing fixtures.

The water pressure in the water supply must be sufficient for all appliances and all users. A sewer pipe is capable of accepting only the volume of wastewater for which it was originally designed.

There are several types of plastic pipes:

• "PP"– polypropylene;
• "PE"– polyethylene (most often HDPE);
• "PVC» – polyvinyl chloride;
• "PEX"– made of cross-linked polyethylene;
• "REH-AL-REH"– metal-plastic.

The differences relate to the methods of connecting them to fittings and to each other in cases where an additional element is inserted into an existing pipeline.

Laying water pipes on garden plot or into a built country house - this is a common thing for a country house. But if you don’t want problems in the future, then you need to do this work correctly, without violating laws and technical standards. The plot or house is being developed for a long time, so it is inappropriate to be cunning here.

Peculiarities

All work related to the additional use of the city or village water supply system is coordinated with the local water utility. Unauthorized connection to a main pipeline or even an individual one to a plot, house, or apartment before the meter is an administrative violation, for which large fines may be imposed on the guilty person. If permits are obtained, work on the main lines to insert additional branches with shut-off valves using a common meter must be carried out by water utility specialists. The applicant carries out the wiring of the water supply system inside the house or site independently, but according to the floor plan and profile drawing of the water supply pipelines, which were documented when obtaining the permit.

You need to understand that any illegal connection to a utility water pipe will be detected sooner or later.

Employees of water supply organizations carry out raids every week to identify violators, especially in cases of large differences in consumption indicators by devices and actual water consumption. The violator can use the water for only two days, and the fine is calculated using a calculation formula for at least six months. The risk of being discovered more than 20 times in these six months is too great. Is the game worth the candle? Of course not.

Calculation

To avoid having to do the work twice, you need to approach the issue of water supply to your site, house, additional buildings or household devices thoroughly. To do this, you should make a competent calculation of the required water flow according to the plan and a schematic layout of the pipes of the connected sanitary premises - bathtub, shower, toilet, kitchen, with sanitary devices (toilet with flush tank, sinks with mixers, shower, washing and dishwasher machines) and irrigation means.

There is a formula for calculating water supply for internal water supply taking into account (according to SNiP 2.04.01-85 “Internal water supply and sewerage of buildings”) standard water consumption in l/s of each appliance, devices and the number of family members using them:

Qmax = 5 q, where:

• Qmax is the maximum second water flow through one plumbing fixture;
• q is total consumption liquids of one consumed device, determined in accordance with sanitary standards and rules;
• 5 is a coefficient determined from the tables in the SNiP appendices, depending on the probability of operation of a particular device and their number.

Determination of the probability of operation of devices is calculated using the following formula:

P = (U·Qnorm) / (q·N·3600), where:

• U is the number of family members (water consumers);
• Qnorm is the total normalized water consumption by one consumer per hour of greatest water consumption (equal to 10.5 l/hour);
• N is the number of such devices;
• 3600 is the time of the hour in seconds (3600 sec).

Having received the indicators N and P, based on their dependence in Table 2 of Appendix 4 of SNiP 2.04.01-85, the coefficient is determined and the maximum second water flow through a separate device Qmax is calculated. By adding up the data and converting it from seconds to hours, the daily water supply for the entire site can be easily obtained. And based on the data obtained on daily water consumption, the value of the minimum internal diameter of the pipe that will approach the site or house from the main or secondary water supply line is determined. This pipe will need to be cut into the central water supply. And the calculation formula for pipe diameter looks like this:

d = √[ (4 Qmax) / (V) ] m, where:

• d is the internal diameter of the pipeline being calculated in meters;
• V is the speed of water flow, m/s. It is taken equal to 2.5 m/s in accordance with paragraph 7.6 of SNiP 2.04.01-85, indicating that the fluid speed in internal water supply should not exceed 3 m/s;
• Qmax is the already calculated water flow rate per object, m³/s.

The choice of pipe for branching depends on the pressure in the pipeline where the tap will be made, and the material from which this water supply is made. According to SNiP 2.04.02-84, SNiP 2.04.01.85 and GOST for the normal supply of the urban population cold water For household and drinking purposes, the pressure in the supply main pipeline should be within 10 kgf/cm². Water must reach the consumer with a pressure of no lower than 0.3 and no higher than 6.0 kgf/cm². It is impossible to achieve the same pressure for consumers living at different distances and heights from the water supply source. Even in one house, the water pressure will be greater in apartments on the first floors.

For the correct functioning of most sanitary appliances that consume water, a pressure ranging from 2 to 3.5 kgf/cm² is sufficient. For private houses outside the city, the situation is worse: not everywhere can be found nearby water supply network, and if it exists, then its capabilities are much weaker. Pressure in rural areas rarely rises even in the main line above 2.5 kgf/cm². And for efficient watering the plot needs a pressure in the irrigation tap of at least 3.5 kgf/cm². In this case, you can use a booster pump with a pressure of 4–6 atmospheres.

The following pipes are used to lay the water supply:

• steel made of ferrous metal;
• from stainless steel;
• cast iron;
• plastic;
• polyethylene.

Stainless steel pipes are used by owners of elite holiday villages, as well as in important or hard to reach places gaskets This is done in order to avoid frequent repairs in the future with a rotten metal pipeline from the “chernushka”. Steel and cast iron pipelines are used for laying high and medium pressure main lines with a diameter of 100 to 2500 mm. Sometimes for central water supply lines they use plastic pipes high pressure. Secondary water lines are often made from low-pressure polyethylene pipes (LDPE) with a diameter of up to 70 mm.

All further preparation depends on the pipe chosen for insertion, namely:

• security issues are being resolved safe conditions for insertion;
• is selected necessary tool and material;
• the method of tapping into the water supply is determined.

The working conditions depend on the location in which the possibility of insertion is permitted. If there is a main water supply well nearby, and it also contains a backup tee for tapping, then tapping will be the simplest option of all the others. If there is no well, then you will have to build it with the help and resources of the customer. To do this, a hole is dug 0.5 m deep below the level of the central water supply and its base is concreted with a waterproofing layer laid. And a shaft is laid out on top of the base or installed concrete ring. It will be easier to weld a caisson from 5 mm metal and install it in the pit. In any case, the well must be coated with an anti-corrosion compound. The outer part of the well is filled with soil, and a slab with a hole for the hatch is placed on top of it.

Methods

Often the material of the water supply pipeline determines both the material of the branch line pipe and the insertion method. If the central or secondary pipe is steel, then it is also better to use a steel pipe. As a last resort, make a transition section in the form of a fitting made of a steel pipe with a valve, to which then connect a pipeline made of another material.

Tapping of steel pipes is done in two ways:

• using a welding machine by welding a fitting to the water supply;
• using a steel clamp without welding.

Both methods are used both when tapping into a pipeline that is under pressure and without pressure. But on high-pressure pipelines, welding is recommended to be used only in emergency situations. emergency cases, as well as when organizing additional security measures. In the normal mode of work, actions are required to completely shut off the section of the water pipeline where the tie-in is made using welding.

The algorithm for working with welding on an existing pipeline is as follows:

• a hole is dug with an excavator to a level approximately 50 cm above the laid pipeline;
• the section of pipe into which the insertion is planned is manually cleared of soil;
• the insertion site is cleared of anti-corrosion coating and other protective layers, and the specific area of ​​connection of the fitting or branch pipeline is cleaned to shiny metal;
• the fitting is welded to the tap;
• after the metal heated by welding has cooled, a drill is inserted into the fitting through the tap and a hole is drilled in the wall of the water supply;
• when water flows through the fitting, the drill is removed and the tap is closed (the insertion is completed, further laying of the water supply line begins from the valve on the fitting).

A mortise clamp is a simple piece consisting of two halves of semicircular shapes. These halves are put on the pipe and tightened together with bolts and nuts. They differ from ordinary clamps only in the presence of a threaded hole on one of the metal parts. A fitting is inserted into this hole, serving as part of the outlet line. The hole for the pipe can be located anywhere in the water supply system, and when screwing in the fitting, it will always be at right angles to the linear plane of the pipeline surface.

The rest of the process is similar to tapping using welding: a drill is inserted into the fitting through a tap and a hole is drilled. If the tap is of small diameter and the pressure in the water supply is within 3–4 kgf/cm², then the tap can be screwed on without any problems even after drilling (if it is threaded and not welded). Additional lines are also connected to the cast iron main using clamps.

Welding cannot be used due to the low ductility of cast iron, because it can crack in areas of overheating.

Insertion into pipes made of plastic or polyethylene occurs using plastic clamps or saddles (half-clamp with fasteners). Clamps and saddles can be simple or welded. Working with simple devices not much different from inserting a clamp into a steel pipe. And welded saddles or clamps contain all the equipment necessary for welding. This saddle assembly is installed on the pipe in the intended location, the terminals are connected to electricity, and after a few minutes the insertion will be automatically completed.

How to crash?

When the branch from the main line is carried out by specialists, the customer will be able to lay a line from the tap at the fitting to the site, house or separate building on his territory, independently or with the help of the same professionals. Having made the entry to the site, you need to install another valve either in the well (if it is installed), or install it in a comfortable and warm place in the house, for example, in the basement. It will be needed for an emergency shutdown of the water supply. After the inlet valve leave small area pipeline of the same diameter as the line to the valve, from which smaller diameter lines will go along the planned distribution. The open end of the pipe is sealed using welding and a sheet of metal of appropriate thickness.

It may well happen that it is urgently necessary to make a connection into an existing water supply system, for example, to connect an additional device to the water supply system (a washing machine or dishwasher), or, if you built a new one private house, you need to supply water to it, or the old supply is clogged and requires replacement. But it is not always possible to turn off the water. There is only one way out - tapping into the water supply under pressure with your own hands.

The essence of the process

In order for intervention in a water supply system that is filled with water under pressure to cause minimal damage, you need to figure out what to do and how to do it. Let's start with the pipe material. Modern water pipelines are installed from metal, plastic and metal-plastic pipes. Cast iron pipes are less common.

In order to cut into such a pipeline, a hole must be made in it. It goes without saying that a stream of water will immediately “burst” out of it. Therefore, it is necessary to provide for how to quickly and securely close this hole, but so that it is possible to subsequently attach a continuation of the branch to it. In other words, after making a hole, a shut-off valve is cut in with the possibility of connecting an additional pipe to it. Basically, tapping into a water supply system under pressure is done using special clamps. The design of these devices depends on the material of the pipe.

Tap-in technology

Let's consider from a practical point of view how to make a hole in a pipe with water. There are two general rules when tapping into a pipeline:

1. The pipe being cut into must be smaller in diameter than the pipe in which the hole is being made.
2. The diameter of the drill must correspond to the internal diameter of the pipe being inserted, which, in turn, must be smaller in diameter than the main pipe.

Pay attention! When performing tapping work, all safety precautions must be observed.

If you need to cut into a metal water pipe, you will have to use a tapping saddle clamp with drilling. The saddle clamp is called because its lower part is a semicircle that looks like a saddle. There are several varieties of such clamps. Before installing this device on the pipe, it must be thoroughly cleaned of dirt and rust (if any). In addition to the “seat”, the clamp has a shut-off valve in the upper part with a hole for drilling and a drill. Both parts on the pipe are bolted to each other. The clamp fits tightly to the surface of the pipe using sealing rubber bands. After securing it with a drill, make a hole until water appears. Then the drill is unscrewed and the plug is closed with a special screw so that water does not flow out of the pipe. In the future, such a clamp can be used as shut-off valves. You can also use a clamp with a valve already screwed into it.

After the hole is ready, the drill is pulled out and the valve is closed. Now you can carry out other work on installing the plumbing. You can also attach a special machine to a simple metal clamp, the main elements of which are a handle with a ratchet, a locking bolt, a shaft with a drill at the end, and a flushing tap. All this is enclosed in a metal case and attached to the clamp using rubber seals. The guide sleeve allows you to drill in a given direction. It is used to drill metal and cast iron pipes.

To drill a cast iron pipeline under pressure, use bimetallic crowns and clamps special design. The nuance of working with cast iron is that:

• It is necessary to work with light pressure. Cast iron is a brittle metal and does not work well under compression and tension;
• pre-clean the surface of the pipe from a special layer applied to the surface to prevent corrosion;
• Do not allow the crown to overheat;
• should work at low speeds.

If you want to cut into a plastic pipeline, it is better to use an electric welded saddle clamp. It is made of special plastic, equipped with a heating coil and a drilling mechanism. There is a barcode on the seat body that allows you to accurately enter the necessary parameters: welding and cooling time, etc. The clamp is bolted to the pre-cleaned pipe. Using a special welding machine, the spiral is heated and the outlet is welded (there are terminals on the clamp for welding connection). Next, an hour after cooling, a hole is made with a special cutter and the shut-off valve is screwed on.

Metal-plastic is used mainly for distributing water around a house or apartment. Consequently, the diameter of the pipes is small. If there is no inlet valve and it is not possible to shut off the water with the help of special services (housing office, water utility), then to supply water to an additional point you will have to cut in under pressure. The use of clamps in this case is not advisable due to the small diameter of the pipe. How to make such a sidebar? Very simple. It is necessary to prepare a water container, a floor cloth, a tool, a valve and special fasteners. The pipe is cut. The end from which water flows is lowered into a container of water. A nut and clamp are put on it. Then a valve is inserted into it in the open position, which is clamped with a nut. Then, after closing the tap, you can continue installation.

Peculiarities

All proposed methods of tapping into a water supply system under pressure require certain qualifications, experience and the availability of special tools. After all, you need to act quickly to prevent a large water leak. If the tie-in occurs in the main pipeline, which is located underground, then the water pressure is quite high and taking such a “shower” is not very pleasant even in summer. Moreover, the work is carried out with hand tools; for safety reasons, power tools are not used. In addition, if you independently insert into the main pipeline, you will have to obtain permission from the water supply organization - the owner of the pipeline. And this is associated with a certain paperwork, a waste of time and nerves.

When it is necessary to cut into the supply pipe in the middle apartment building, then slowness will lead to flooding of the lower floors.

Of course, no one can forbid a man to do such work himself, but for this it is necessary to have a set of certain tools. It doesn’t make much sense to buy them for a one-time job: the tools are expensive, and after cutting in they will simply lie in the pantry or garage until next case. Therefore, judge for yourself - how possible self-insertion into the water supply under pressure. The decision, of course, is up to the individual, but it is most reasonable to invite a specialist with experience in performing such work to perform such an insert.

Video

This video shows an insertion into a polyethylene pipeline using a Poly16 Plus saddle with a cutter.

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 working 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. 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 insertion into the system

Before starting installation work, it is recommended to coordinate it with the water utility and local administration. If on plot of land there is no central sewerage system, tapping may be prohibited. But if there is a septic tank and all installed 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 corrosion protection will need to be restored.

If the pipeline is laid from polyethylene pipes, then welding work is not carried out. Based on diameter consumables 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 additional elements networks. 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.

More simple method Installation of a branch is considered to be the insertion of 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 either side 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. TO installed tap a drain pipe is installed.

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.

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, for welding you will need special equipment. Welding work are considered complex and time-consuming.

Non-welding tapping technologies include:

• collector installation – 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.

Construction of plastic and metal networks

To enter 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 slightly different from the tap-in technology 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 renovation work. They can be done independently or with the help of specialists. If the system is sealed, the line is ready for use.