How to eliminate a leak in a heating pipe: mechanical sealing of the hole and chemical sealing of the leak

During the operation of systems containing pipelines, leaks often occur. Such malfunctions can occur as a result of careless handling, improper installation, or simply due to wear and tear of the material. Moreover, a leak can occur in pipes made of both metal and plastic-containing substances (plastic, metal-plastic, polypropylene, etc.)

The following troubleshooting methods are available:

• Mechanical
• Chemical
• Combined.

The first type is associated with the use of improvised means. Self-tapping screws, harnesses, clamps and more can act in this capacity.

With the chemical method, the malfunction is eliminated using adhesive and astringent chemicals, such as silicone or other sealant.

The latter method involves the use of mechanical means and chemicals.

Regardless of which method will be used, it is necessary to decide “whether it is necessary to shut off the entire water supply system, only a separate part of it, or whether shutting off is not required at all.”

In case of small diameter holes (up to 2-3 mm), shutting down the system is not necessary. If holes of a larger diameter appear, in order to avoid emergency situations, it is better to shut off the network above the leakage point (along the direction of movement of the liquid in the pipe).

How to seal a leak

In connection, on threads and joints

All heating elements are assembled into a single system using threaded, welded, soldered and fitting connections.
Any of them is the least reliable place and it happens - they leak. Leaks in pipe joints, whether metal or polypropylene, can be eliminated using epoxy resin-based glue. To do this, the surface of the metal pipe along with any damage must be cleaned of old paint and rust. You can clean it with a wire brush, sandpaper, or scrape it off with a knife. Prepare fiberglass or medical bandage. If the pipe has a diameter of 15 to 32 mm, the length of the fabric is approximately 30-35 cm. Then add a hardener to the glue base in the proportion specified in the instructions. You can add more hardener to increase the hardening speed. The main thing is not to overdo it, otherwise you won’t have time to finish before the glue hardens. Soak the fabric with glue and wrap the damaged area. Once hardened, the heating can be started. Work with rubber gloves. Leaks at the joints of polypropylene pipes can be eliminated in the same way.

Most often, threaded connections of the radiator and pipes leak. In these places and at the joints, in addition to epoxy glue, cold welding and cement-plaster dressings can be used. The method is old, but quite workable. Ready-made dressings are rarely found on sale. Therefore, they are prepared independently. Cement is mixed with alabaster (construction gypsum) in a ratio of 1 to 0.5, diluted with water to a thick rustic sour cream, the bandage is cut into strips of 30-35 cm, and placed in a container with cement-gypsum mortar, then soaked, applied in layers over the threaded connections, cover the top with the remaining solution. Sometimes salt is added to the composition.

In the radiator and pipes

There are damages in the radiator sections. It is often not possible to repair a hole in a radiator without dismantling it. It can only be sealed where there is access. If you are lucky and the hole is accessible, you can seal it using a roofing screw, bolt or chopper. Well, everything is clear with the chopper, sharpen it and hammer it into the hole, carefully cut off the excess.

If there is a large hole in the battery, you can install a bolt. To do this, you need to drill a hole and cut the thread using a tap and dip the body of the bolt in paint and screw it into place. This is easy to do only on paper, in reality everything is much more complicated. The same methods can be applied to pipe repair. If the pipe is thick-walled (3 mm or more)

Between battery sections

Leaks between battery sections can be eliminated if it is cast iron. For aluminum and bimetallic ones, the sections are located very close and it is impossible to get there.

Repair using cold welding or epoxy glue; in addition, a narrow clamp can be installed over the adhesive bandage or cold welding. It will press everything underneath it against the body of the battery. Heat-resistant sealant can also be used in combination with the clamp.

Hidden wiring

Hidden, this is part of the heating system, which is covered with a concrete floor screed, insulation or decorative boxes. In all these cases, the most difficult thing is to find and get to the place of damage. And after that, evaluate which repair method to choose. There is no way without professionals.

On a straight section

On straight and accessible sections, you can use any method that you like best and works better. But the most reliable method will be the mechanical method using clamps or bandages.

Use of special sealants

Unlike mechanical means, the use of sealing compounds does not provide a 100% guarantee of eliminating leaks. On the other hand, it is impossible to use clamps and tape on the flat surface of the radiator when the fistula is located directly on the front panel. There are 3 options left: try a chemical, weld the hole, or replace the battery.

Undoubtedly, sealant for pipes and radiators is the most convenient tool for the average user. Before throwing the heating device into a landfill, you can try to seal it. What sealants are usually used in such situations:

• two-component plastic composition called “cold welding”;
• liquid agents added to the coolant;
• adhesive heat-resistant plastic that hardens after ultraviolet radiation.

Reference. High-quality cold welding from Loctite costs about 27 USD. e., 1 liter of liquid sealant “Aquastop” – 72 USD. e., light-curing plastic Bondic – 32 cu. e. per set.

Two-component waterproof glue will definitely help if you strictly follow the technology - dry, clean and degrease the defective area before applying a patch. See the video below for cold welding tests on water pipes.

Liquid sealants are offered for different coolants (water, antifreeze) and types of heating systems. After adding the product, chemical compounds fill the fistulas from the inside within 2 days. Of course, large defects and through holes cannot be repaired; you must first use a mechanical method. For example, hammer a wooden chop into the hole.

Note. Aquastop liquid is mixed with the coolant in a ratio of 1: 100. That is, it will take no more than 0.5 liters of product to seal the closed system of a one-story house.

Bondic plastic gel is sold complete with an irradiator and is applied to the damage in small portions. Each subsequent drop is illuminated by ultraviolet light and instantly hardens. An indispensable condition is a dry, grease-free surface; the type of pipe material does not matter.

Plastic becomes solid after irradiation with ultraviolet light, before which the material remains liquid indefinitely.

Fixing a leak in a heating pipe without draining the water

What to do in this case if it is necessary to eliminate the leak? After all, in this case, cold welding will not help. There is a way out - this is the same “stub” discussed above. The material impregnated with the sealant is able to adhere even to a wet surface.

The mixture can be purchased at a hardware store. Wipe the surface of the pipe dry, and then wrap a cloth with sealant. This method of repair helps with minor digging.

If the leak in the pipe gets worse, use a piece of rubber as a temporary seal. For example, cut the required size from a bicycle or car tube. There should be a piece in reserve.

Wrap the prepared rubber tightly around the area where the crack is observed. For fixation, it is advisable to use one worm clamp or several pieces. You can use car clamps that are designed to connect pipes. Press down the rubber gasket with a clamp and screw it in with a screwdriver. This simple method will help eliminate the leak or reduce it slightly.

At the hardware store, you can purchase ready-made kits for repairing pipes in the event of a leak. It includes a prepared clamp with a rubber gasket and a small valve. Thanks to it, it is possible to drain accumulated water from under the clamp while installation is taking place.

After the clamp is securely fixed, the valve closes tightly and the flow stops. Such kits for repairing heating and other types of pipes help prevent an undesirable situation in the event of severe leakage. Other means are unlikely to save you.

In addition, if it is not possible to drain the water from the heating system, you can use another simple method. Using a special product, dry and freeze the section of pipe with the crack, and then seal it with glue or sealant.

The most relevant means are “Apparatus Moroz”, “FREEZE PACK” and others. Such treatments help to freeze the water in the damaged heating pipeline. At this moment, the water pressure in the damaged area decreases, which makes it possible to cut out a piece of pipe and weld a new one. You can also apply a “plug” to this area.

It is necessary to understand that the methods presented in our material for eliminating leaks in pipes using cold welding, sealant, adhesive, and ready-made repair kits are just a temporary measure. Over time, the crack will widen, rust may reappear and the leak will resume.

It is advisable to do a thorough repair of pipes in the summer, namely, drain the water and completely replace the area with a crack or rust. If this is not done, then in winter you can again expect unpleasant surprises. It is best to invite specialists for repair work.

Causes of leaks

In non-pressure systems, emergency situations arise due to improper operation, poor-quality installation and manufacturing defects. A connection made incorrectly always causes network depressurization.

I drilled a polypropylene pipe into the wall, what should I do?

Polypropylene is not difficult to damage due to mechanical stress. Most often, leaks in a free-flow system occur precisely because of external interference. Mechanical stress negatively affects rubber sealing elements, which are used to make most connections in non-pressure networks.

In systems under pressure, accidents occur for the following reasons:

• physical impact;
• incorrect installation;
• non-compliance with recommendations during operation;
• increased blood pressure;
• erroneous assembly;
• use of low-quality materials.

Often, a violation of the tightness of the PP system occurs during repair and construction work. Often installers or builders drill into pipelines.

The cause of the emergency can also be factory defects, because there are polymer pipes made in China.

PP products have a durability of 50 years. This is exactly the guarantee that bona fide manufacturers of certified products issue.

The essence of the cold welding method

The idea proposed by the inventors of this method of connecting parts is quite simple. The composite material is thoroughly mixed, after which complex chemical reactions are launched, imparting new properties to the mixture. Over time, the soft composition hardens, penetrates the structure of the materials being bonded and becomes comparable in strength to metal surfaces.

Excellent performance characteristics make it possible to use cold welding to solve a wide range of household problems:

• Elimination of leaks in metal and polymer water-pressure structures.
• Sealing cracks in heating radiators.
• Sealing places of damage to metal elements of the car body.
• Strengthening problem areas of pipeline networks.

The material can become indispensable in situations where the problem section of the pipeline is in a hard-to-reach place, where, even if you wanted to, it would not be possible to use a welding machine or other bulky device.

Repair of polypropylene pipes in hard-to-reach places

It is not always convenient to carry out repair work directly at the accident site. The difficulty lies in using a soldering iron, since the process is carried out in a limited space.

Plumbers work

In this case, to perform welding, perform the following steps:

• The tool is prepared and checked.
• Burrs, dust, dirt and grease are removed from the surfaces being welded. Degreasing is performed with wipes soaked in solvent or white spirit. The substance used must be completely dry.
• The soldering iron heats up to 260 °C.
• The hot pipe nozzle is removed using a gas wrench and quickly put on the pipe in a hard-to-reach place. At the same time, the fitting is heated on the soldering iron.
• The nozzle is removed from the pipeline element in a limited space, and the connecting part is removed from the tool.
• The heated PP parts of the pipeline system are joined.

The repair process in difficult places can also be carried out using a classic fitting with a union nut - an American one. It can be easily installed and removed. This fitting allows you to quickly remove the system assembly for repair or complete replacement. American provides a high level of tightness.

Manufacturers produce American fittings with internal, external threads and mixed types. They are made from various alloys, including steel and brass. American ones are produced in the form of plugs, crosses, tees and adapter couplings.

Heating radiator leaking

If you find a leak in the heating battery itself, you can plug the hole using a simple self-tapping screw. This is done to reduce the flow of water, which will make it easier to carry out subsequent repair work, even if the taps are not turned off.

If a hole forms in the joint of the heating radiator, the problem is eliminated using a piece of fabric glued with epoxy. They wrap it around the damaged area. The leak has been fixed and you can rest easy until the end of the season.

By using a thick piece of fabric, electrical tape, tape and salt, you can also eliminate a leak in the heating battery:

• pour salt onto a cloth and wrap the damaged area;
• We secure everything with tape.

If the leak is not found, you should temporarily turn off the taps of the heating system, remove the battery, and lower it into a container of water. Then we determine the damaged area by the place where the air passes through. A sealant is used for repairs. After filling the damaged area, we additionally apply a fabric wrap and attach the heating radiators back.

Typically, at the top of the heating radiator there are air release valves that can be used during its operation. After the end of the operating season, the heating radiator or its damaged sections are replaced with new ones.

If a section of the radiator is leaking, the same procedure is followed as for a radiator leak.

Radiators and heating pipes can be either plastic or aluminum; they are a little more difficult to repair, and special skills are required to eliminate leaks in them. If a cast iron battery leaks, then cold welding will be required to repair it.

It is necessary to worry in advance about the availability of the necessary materials for repairing the heating system, and to repair everything more thoroughly after the end of the heating season.

The first signs of a pipeline leak

In most cases, leaks in utility lines are immediately noticeable. After all, puddles appear on the floor and other structural elements of the building. However, minor leaks are not always so obvious.

Heating pipe is leaking

If the leak is small, it can be determined by the following signs:

• PP pipes become wet;
• drops that look like dew appear in the area of ​​the fittings;
• the pressure in the pipeline system drops sharply.

If any of the above situations occurs, the owner of an apartment or house needs to pay attention to the water supply network. Perhaps it's time for a renovation.

A leak that is not eliminated, even in the form of a small trickle of water, will cause irreparable harm. Moisture can get on electrical appliances, penetrate electrical cables, or ruin just-completed renovations for neighbors on lower floors.

Preventing Leaks

In order to prevent the formation of leaks in sewer, plumbing and heating systems, you should follow the simple recommendations of specialists:

• do not allow the drain pipeline to become clogged;
• make sure that condensation does not form on the cold riser;
• freezing of the external pipeline is unacceptable;

Each of the proposed solutions to the problem does not cause technical difficulties. The only exception is a malfunction of the metal or plastic system on the drains. In this case, simply covering up the damaged area will not work; this will require the help of specialists and the use of equipment.

Pipe connection is leaking

Leaks at pipe joints can be eliminated using the same homemade or factory-made clamps. If there is a difference in diameter, you can first wind the rubber band and then make or put on a clamp.

If the connection is threaded and drips from under the winding, you can pour alcohol onto the tow and then spread it with BF glue. It is alcohol soluble. Once on the alcohol-contained tow, it liquefies and can flow into the joint. Then, when the alcohol evaporates, the glue dries, and the “drops” stop. But this method only works if you have “drops” and not a “fountain”. And one more thing: such a processed connection is then very difficult to disassemble.

If it is possible to stop the system or disconnect the radiator (if there is a leak at the junction with it), it is better to repack the threaded connection. To do this, carefully and slowly unscrew the nut (lock nut). It needs to be turned away and then wrapped. Don’t make significant efforts - there is a high chance of breaking it, and then you will definitely have to stop the system and redo everything. After tightening the nut, remove all the tow or fum tape, remove any remaining sealant, and in general, thoroughly clean the threads. Wipe it until clean, you can treat it with a degreaser (acetone or pure gasoline).

If it leaks under the locknut, it can be repacked

Please note that there is no excess tow - just a little, and paste on top. Take the winding and paste (sealant), wind the flax and coat everything with paste

Now you can twist it. First with your hand, then with a key. But here you also need to work carefully: it’s very easy to break the thread. Therefore, hold the key not by the edge, but in the middle - it’s easier to calculate the effort. Don’t overdo it with the amount of tow either. If cast iron, in principle, does not matter how much winding you wind, then aluminum and bimetallic, as well as steel, can crack from a large amount. A microcrack first appears in the collector, into which water leaks. The metal corrodes, the paint swells, a section (or the entire radiator) is damaged

Take the winding and paste (sealant), wind the flax and coat everything with the paste. Now you can twist it. First with your hand, then with a key. But here you also need to work carefully: it’s very easy to break the thread. Therefore, hold the key not by the edge, but in the middle - it’s easier to calculate the effort. Don’t overdo it with the amount of tow either. If cast iron, in principle, does not matter how much winding you wind, then aluminum and bimetallic, as well as steel, can crack from a large amount. A microcrack first appears in the collector, into which water leaks. The metal corrodes, the paint swells, a section (or the entire radiator) is damaged.

But this is all in cases where the threaded connection is leaking. If a fitting under a press (metal-plastic pipes) has leaked, you can try to simply tighten it. In the case of copper pipes, only soldering will work. If there is a leak at the junction of polypropylene pipes, there is also only one option - cut out the damaged piece and weld a new one.

It doesn't matter what you use. The result is important

Is it even possible to do this?

It is quite possible to patch up a pressure pipe that unexpectedly leaks on your own using improvised means.
The only caveat is if the leak is insignificant , and the water oozes slightly, and does not gush in an endless stream.

When the accident is more serious, you will need to urgently tighten the valve that controls the water supply to the coolant, and then call a repair service.

How to fix a pipe body leak

How to repair a leak in a pipe if there is a crack in the body? To resolve the problem, you can use one of the following methods:

• install the clamp;
• apply a bandage;
• use cold welding.

Installation of the clamp

The easiest way to eliminate a leak on the pipe body is to install a repair clamp. The special device consists of:

• metal case;
• rubber seal located inside the housing;
• fixing bolts.

Special device for eliminating pipe leaks

You can install the clamp yourself in the following way:

1. the leak site is cleaned of dust and rust;
2. the pipe is wrapped with a clamp;
3. The device is fixed.

Eliminating leaks using a clamp

Applying a bandage

How to seal a leaking pipe if there is no clamp? To eliminate a leak, you can use a rubber, adhesive or cement bandage.

The rubber bandage is:

• piece of rubber. A cut from a bicycle inner tube or a medical tourniquet used to stop bleeding is ideal. Use a rubber cut to wrap around the cracked section of the pipe;
• small clamps, wire or other fastening straps for securing the rubber to the pipe.

Pipe bandage made from scrap materials

The adhesive bandage is installed according to the following scheme:

1. the section of the pipe where the leak has occurred is cleaned of dirt using a solvent;
2. fiberglass or medical bandage is impregnated with special glue;

Special composition for eliminating leaks

1. the pipe is wrapped in prepared material in several layers;

Installing an adhesive bandage at the leak site

Watch the video to see how to cover a leaking pipe with epoxy resin.

A cement bandage is an analogue of an adhesive bandage. The bandage or fiberglass is impregnated with cement mortar prepared in a ratio of 1:10.

Cold pipe welding

A relatively new way to eliminate leaks is to use a so-called cold welding composition. How to coat a pipe to prevent it from leaking? For different types of pipes (metal, plastic, metal-plastic, and so on), different cold welding compositions are used.

Composition for various types of plastic pipes

Detailed instructions for using the mixture are given on the bottle with the active substance. Here is the general algorithm:

1. Before applying the mixture, the damaged section of the pipeline is cleaned of dirt. If the composition needs to be applied to a metal pipe, then the crack is additionally cleaned of paint and rust;

Cleaning the pipe before cold welding

1. A special composition is applied to the damaged area. If liquid cold welding in the form of glue is used, it is advisable to apply it with a brush. If a plasticine-like composition is used, then before application it is necessary to knead it thoroughly until a homogeneous mixture is obtained;
2. the cold welding substance is evenly distributed throughout the entire area of ​​the cracked pipeline, covering 3–4 cm more than the crack itself;

Coating the damaged area with a cold welding substance

1. the composition is left until completely dry, which takes an average of 2.5 - 3 hours.

All methods given in the article for eliminating leaks on the pipe body, except for the use of cold welding, are only a temporary measure. To completely get rid of the problem, it is necessary to completely replace the damaged section of the pipeline. It is advisable to involve qualified specialists to perform this operation.

Why is plastic good?

Plastic is a general name for materials made from natural or synthetic polymers. "Poly" means "many": the molecules of these materials consist of dozens of units.

Plastic pipes are made from polyvinyl chloride (PVC), polypropylene, polyethylene, polybutylene and other polymer materials. They are used to install water, heat and gas pipelines, as well as sewerage. Square pipes are produced - they are used for the manufacture of furniture, as fence posts and drinking bowls for pets, when installing water supplies for industrial greenhouses.

In metal-plastic pipes, a layer of aluminum is inserted between two layers of polymer. The metal layer prevents the pipe from deforming when hot water flows through it.

Plastic pipes do not rust, salts are not deposited on their inner walls, they maintain the temperature of water in heating pipes and hot water supply pipes, and suppress the noise of the water flow. However, not all installers of water and heating pipes have their hands attached according to GOST. Therefore, leaks appear in plastic pipes.

How to fix a leak in a heating pipe

Methods for eliminating leaks in heating pipes depend on a number of factors:

• the material from which the pipe is made;
• location of the leak (flat area or junction).

The best way to fix a leak is to call a specialist who can fix all the problems. If this cannot be done for some reason, then there are other methods by which you can repair the pipe yourself.

Many have already dealt with the question of why a leak may form in a heating pipe. There are several ways to fix this common defect.

If the leak occurs on a flat section of the pipe, then you need to determine the location of the damage. Then place a piece of rubber larger than the hole on this place and tighten the entire structure with soft wire. There are ready-made materials for this procedure on sale.

If a leak appears at the junction of the heating pipe with the radiator or tap at the threaded connection, then in this case the task becomes somewhat more complicated. Pipes of different diameters can be located at the junction points.

You can also wrap a long piece of soft rubber around the leak and use a clamp to compress the damaged section of the pipe. This option is not the final way to eliminate the breakdown, since the connection point must be disassembled and, if necessary, remade. And this can only be done with the heating system turned off.

In a city apartment, you still need to call a specialist for this, but in a private house, with an autonomous system, you can do it yourself. Therefore, before the heating season, just in case, it is necessary to have spare parts or new couplings for connecting pipes.

If the cause of a leak in a heating pipe is a pressure difference in the coolant, then in this case it is necessary to eliminate this problem.

Due to the fact that the heating system uses pipes of different diameters, water hammer may occur, especially when the owner of an apartment or house tries to bleed air from the system. To eliminate this problem, it is necessary to create special expansion devices or compensation loops.

If a leak occurs between sections of the heating radiator, you can temporarily wrap this area with thick fabric, which is impregnated with sealant or moisture-resistant glue. When the glue dries, you can turn on the radiator. Then you should definitely invite a specialist to completely eliminate the leak.

You can use a special sealant for heating pipes “cold welding”. As the name suggests, this material has high drying strength. Therefore, this sealant is often used for repairs in heating systems and even in the repair of car radiators.

Sealant Cold welding

All methods for eliminating leaks in heating pipes are good. However, they are temporary. Only a specialist can completely eliminate all the causes.

When is it necessary to repair your heating system?

Naturally, major repairs of the entire heating system must be carried out in a timely manner before the onset of the cold season. If the heating pipe drips in winter, this means that appropriate measures were not taken in summer.

If the heating system was installed a long time ago and using steel pipes, then it’s time to think about replacing the metal elements of the system with reinforced polypropylene pipes. Recently, German REHAU plastic pipes, which are leaders in reliability and durability, have become popular. They are adapted to heating systems in our country and if installed correctly, heating pipes will not leak.

All plastic products are not subject to corrosion and have a high degree of strength. Therefore, replacing old worn-out metal pipes is necessary. Patching holes will not lead to a sufficient level of comfort, because every year more and more damage will occur.

It is much easier and cheaper to repair and replace heating systems and communications in the summer, when the heating system is turned off. All work must be carried out in a timely manner, otherwise in winter during severe frosts you will have to turn off the heating in the house.

Preparatory work

When spot repairing a heating system, it is first necessary to determine the specific location of the coolant leak. If the pipeline is laid hidden (in the wall, in the floor), lined with decorative elements or equipped with thermal insulation, the task becomes more complicated.

Important! In a situation where a pipe or joint embedded in a wall has leaked, it is advisable to consider the possibility of installing a new section of the pipeline, since it makes no sense to spoil the finish of the room to repair a pipe with a high degree of wear.

In the supposed emergency section of the circuit, decorative finishing and thermal insulation are dismantled, the location of the leak is found, after which the nature and extent of the damage, as well as its accessibility to repair, are assessed.

Spot repairs of the heating system can be of three types:

• mechanical - using crimping and tightening devices, electric welding and other means not based on the use of sealing solutions;
• chemical - using various types of sealing compounds that harden as a result of chemical reactions or drying;
• combined - sealing the circuit using a combination of mechanical and chemical methods.

If a mechanical repair method is chosen and the damage is not significant (needle fistula or drip leak), the heating system can be left in operating mode before starting work to eliminate the leak. If the damage is more serious, then the heating must be turned off:

• the autonomous boiler is turned off, the coolant is drained;
• in a central heating system, it is necessary to close the valve of the common riser and hang a warning sign on it, and then also drain the water from the system.

The technology for treating the base before sealing the circuit depends on the material of the pipeline, the status of the leak and the type of repair, but, in any case, the final result of the work is largely determined by the quality of surface preparation.

Leakage at joints

If the heating battery is leaking, what to do and how to fix this problem?

First you need to determine the cause, find out why the pipes are leaking.

Leaks in joints can occur for 2 reasons:

• loose connection of threaded connections;
• pipe body cracked.

Let's consider what to do in such a situation and how to seal leaks at the joints. To do this you will need the following materials:

• rubber tubes;
• wire;
• materials for similar welding - sealants;
• several fasteners, clamps;
• rubber bandage.

First, using a rubber bladder, we block the leak and fix it using 3 clamps or iron wire. We close the leak with one clamp, place the other 2 along the edges of the chamber, or use a plumbing bandage, which is also a thick piece of rubber attached to the pipe with a clamp. It is bolted together to provide a seal.

If a leak occurs at the junction of the pipe and the battery, tie a piece of rubber to the detected leak. We secure it with clamps directly at the leak site and on the pipe itself. A factory bandage or tube rubber can also be used here.

In such cases, cold welding can be used. It is performed using a sealant, which, after kneading, is applied to the damaged area, pressed firmly and smoothed. Hardening occurs within 3 hours.

Regularly, at least once a year, in the summer, it is worth calling a specialist to thoroughly inspect the entire system and replace parts in areas of possible leakage.

Required tools and materials

Depending on the method of repair, the set of tools and materials will change.

Let's try to unify:

1. Set of welding equipment and electrodes. Welding repair.
2. Box or open-end wrenches ranging in size from 8 to 24 mm. When installing bandages and clamps.
3. Latex gloves.
4. Pliers and knife.
5. Annealed steel wire 1.5-2.2 mm.

Options for repairing holes in a plastic pipeline

When carrying out repairs, it is not always possible to use high-temperature connection technology and therefore it is necessary to use other methods:

1. Using a clamp clamp. A temporary measure to solve the problem of how to eliminate a leak in a polypropylene pipe is the use of clamps (for more details: “Types of repair clamps for pipes and rules for their use”). The part with screw clamps is supplemented with a layer of plastic waterproof material, thanks to which it is possible to almost completely eliminate leakage. This method does not interfere with the liquid moving through the system, so there is no need to turn off the water supply. But it also has a drawback - over time, the fastening points of the clamp weaken and the connection loses its tightness.
2. Cold welding technology. Before repairing a leak in a plastic pipe, you should prepare the required amount of the component for the work: knead it in your hands or mix it in a certain proportion. Then the composition is applied to the damaged area, the crack in the pipeline is sealed and the required time is waited until the mixture completely hardens.
3. Application of adhesive bandage. Using a pair of clamping clamps together with a material that is impregnated with glue will help you quickly deal with a leak with your own hands. This can be a two-component composition plus rubber for polypropylene pipe products or a bandage plus cement for sewer pipes. The advantage of this method is that there is no need to shut off the water flow. But for systems operating under high pressure, the use of such a bandage is not allowed.
4. Sealing tape overlay. The method allows for quick repairs if it is not possible to seal a small leak with sealant. Several layers of adhesive tape are wrapped around the damaged area.
5. Using a special sealant. It will be possible to eliminate a leak if a plastic pipe bursts quickly. But this solution is temporary.

There are three types of sealant on sale:

In cases where the water supply or heat supply system is partially laid using a hidden installation method, before proceeding with the repair of the plastic pipeline, you should find out exactly where the damage to the line occurred. To do this, unfortunately, you will have to either dismantle the decorative trim or open the wall covering.

Why do pipes wear out?

For the installation of heating systems in residential buildings and apartments, metal pipes and radiators are most often used. They are highly wear-resistant, have a long service life, and high heat transfer. But even the most wear-resistant structures have a limit of strength and lifespan.

Steel heating radiator

Most often, leaks occur on metal pipes and batteries. Possible causes of wear

:

• Aggressive coolant environment and external factors causing metal corrosion. This process occurs due to condensate entering hard-to-reach and unprotected areas and contributes to the gradual destruction of the walls.
• Factory defects - to protect yourself from purchasing such products, ask the seller for a quality certificate with a Quality Control Department stamp.
• Long service life and mechanical damage. No matter how strong the metal is, it cannot withstand constant increased physical and mechanical loads. The equipment is constantly under high pressure, so it gradually becomes thinner and wears out.
• Incorrect insertion, violation of threaded connections, installation technologies. The most vulnerable places where water leaks most often are welds, joints, threaded connections and the areas around them.
• Violation of the normal operating mode: the cause of a battery breakthrough can be excessive or, conversely, insufficient pressure in the system, as well as a violation of the operating mode.

How to fix a leak and solutions

How to repair a leak in a heating pipe depends on where it occurred: at the junction of sections, at the connection of the radiator with the pipe, on the pipe itself. Repairs are carried out in different ways, let's look at the main methods.

Heating pipe is leaking at the junction

Cold welding

As a rule, it is used at the junction of two battery sections and helps to temporarily close the damaged area. It is made using adhesive-sealant, which can be purchased at a hardware store. It has a special composition that crystallizes when it dries and fills the hole.

Applying “cold welding” to a metal pipe

Procedure

:

• thoroughly clean the damaged area from paint and rust using a brush with metal bristles or sandpaper;
• degrease, alcohol, solvent, acetone are suitable for this;
• cut off a piece of sealant, knead with wet hands until smooth;
• press well into the damaged area on the heating radiator and smooth it out;
• until the composition hardens completely, it must be pressed tightly to the surface;
• Curing time is approximately 20-25 minutes, complete polymerization is after 3 hours.

Cement-plaster cast

If a hole is found on the heating pipe or the junction of the battery sections, you can make a cement-plaster bandage; for this, prepare the following consumables:

• medical bandage, a piece of gauze or thin cotton fabric;
• alabaster (plaster);
• cement;
• bucket or basin with water.

Repairing a leak with a cement bandage

Procedure

:

• dilute cement in water, mixing it with gypsum, the consistency should be like that of rich sour cream;
• take strips of fabric or bandage 25-30 cm long, soak in the resulting composition;
• wrap a cloth around the damaged section of the pipe;
• overlays are made until the bandage is strong and tight.

Application of clamp and rubber

If you notice a heating pipe leaking, you can apply a commercial or homemade clamp, as well as a rubber lining, as a temporary measure. If there is a factory-made clamp of a suitable diameter, it must be applied to the leak and secured tightly with a bolt. If you don’t have one on your farm, you’ll have to make the rubber pad yourself.

Procedure

:

• cut a rectangle from a piece of rubber that will be 2-3 centimeters wider than the hole, the length should be the same as the diameter of the pipe;
• wrap the cover tightly around the pipe, and secure the edges with wire or metal clips; you can make a wire winding along the entire length of the bandage.

Repairing leaks with rubber and a clamp

Welding Application

If a heating battery (not metal-plastic, but cast iron) is leaking in a house or apartment, welding will help eliminate the defect. It can be used anywhere on the radiator. Therefore, after you have made minor repairs yourself or shut off the water supply to the battery, call the emergency service or a private company that provides hot welding services.

Repairing a metal heating pipe using welding

Repairing leaks mechanically

If you want to reliably repair the system and forget about the problem for a long time, you will have to spend money. Moreover, the list of means used is significantly expanded (the price of the product is indicated in brackets):

• clamp clamp for car cooling pipes (0.4 cu);

• pipe bandage with 4 bolts (0.7...10 cu depending on the material and workmanship);
• self-vulcanizing tape (2.5 cu);
• saddle clamp used for insertion, plus a plug (2...10 cu);
• reusable Kibosh clamp from the ROTHENBERGER brand for emergency leak repair (20 euros).

In addition to these devices, “original” fittings – couplings – are used to restore the tightness of plastic lines. The branch of the system is emptied, the pipe is cut at the point of leakage, then the ends are joined using a coupling.

Important point. If a metal-plastic breakthrough occurs inside the screed, a press connector must be installed (under the pliers); the compression coupling cannot be sealed in place.

Metal bandage (left) and plastic saddle clamp (right)
Another simple connector for steel is a reinforced hose of suitable diameter. The latter is installed instead of the cut out rotten section of the water supply system. Fastening method: tight or wire clamps.

Now we will explain one by one the technology of using mechanical sealing means:

1. A car metal clamp is placed over a rubber seal (made from a bicycle or car inner tube). The option is cheap and durable, the disadvantages are its unattractive appearance and use only on metal pipes.
2. The finished bandage is tightened with 4 bolts and placed on a metal and polypropylene line. It is much more reliable in operation and looks better, but is not applicable at joints and turns.
3. The self-vulcanizing tape adheres to a cleaned and degreased surface, including flat surfaces. Suitable for sealing radiators and various pipelines, taps, connections. The disadvantage is that it is not available for open sale; the material is ordered through the online store.

4. The saddle clamp is installed on a highway made of any material except metal-plastic. There is no need to shut off the apartment's riser or drain the coolant from the autonomous system. The element is compressed with bolts, and a plug is screwed into the outlet pipe.
5. The reusable plastic clamp snaps onto the pipe by hand within 2 seconds. A very convenient device for eliminating accidents, but too expensive.

As you can see, only vulcanizing tape is suitable for all types of damage. The remaining clamps and bandages are mounted on straight sections of pipes; it will not be possible to seal the battery, joint or bend. But there are various chemicals for this purpose.

How to fix a leak in a metal pipe

Below we will consider the simplest method for eliminating a crack that has formed in a metal pipeline. You don't need a plumber for this.

Remember that the appearance of cracks can be caused by ordinary human forgetfulness. For example, at a summer cottage, the water from the system was not drained before winter. The water in the pipes will freeze, causing them to burst in some places.

Let's move on directly to our actions, namely sealing the crack. What do we need for work?

• Small galvanized sheet metal.
• Cold welding, such as epoxy glue.
• Metal plate - clamp.
• Metal scissors, screwdriver.
• A vessel in which you will need to stir the composition.

Looking for a crack

Inspect the pipeline for cracks and make markings with a reserve. If the pipe is filled with water, drops or streaks will be visible. If it is hollow, then fill it with water to check.

Dry the crack area. Then clean off rusty deposits and layers of old paint.

Preparing a patch - a clamp

Measure the length of the crack and add a few centimeters to it on both sides. Cut the patch to the desired length from sheet metal. The clamp must be bent in your hands so that it takes an arched shape. Try it on so that it sits tightly on the pipeline.

Preparing the composition

We prepare cold welding for work - dilute it in a separate container if it is a little liquid. Or knead it with your hands if the composition has a dense consistency. You shouldn’t skimp on the adhesive mixture, but don’t overfill it too much.

Repairing the crack

Protect your hands with protective gloves. Apply the prepared cold welding compound to the marked crack that has formed on the metal pipeline.

Cover the leakage area with a piece of sheet metal. Bend the clamp as much as possible, attach it to the pipe and secure it with any ties. Wait a day for the cold weld to set firmly, then you can use the pipeline for its intended purpose.

On a note! After the cold weld has hardened, it is advisable to treat the area with fine sandpaper. The last stage is painting.

In the second option, you need to apply an arc-shaped piece of metal plate, liberally lubricated with glue, to the crack. Secure with zip ties. In appearance, such a repair may not look very aesthetically pleasing, but it is reliable.