Why did the gas boiler leak

What to do if a gas boiler leaks

If, despite the prevention and other measures, a leak nevertheless occurs, the first thing to do is to make sure that the tightness of the boiler is broken, and not the pipes in the immediate vicinity. Remember that boiler repair in most cases requires the use of welding equipment and a special permit, so we strongly do not recommend that you carry out the work yourself.

The second thing to do is to drain the water from the system. A pipe containing water cannot be welded. After completing these steps, you can call the emergency team. Who to call? Of course, to the Complex of Ideas company!

Causes of leakage

The accident is caused by a number of factors. Based on our experience, we argue that the most common causes are:

Excessive pressure created by expanding water under the influence of heating.
Boiler pipe heating under the influence of the burner flame.
Corrosion due to contact with water in the system.
Salts and other impurities found in unfiltered water.
Poor quality welds that allow water to pass through.

It should be remembered that leakage is possible not only when the pipe is destroyed, but also through the sealing gasket. The heat exchanger may also be leaking. Regardless of the cause of the leak, the owner's actions are approximately the same.

Warning

If your heating system has regulators, such as thermostats, or heat carrier flow distributors (used to equalize flow resistance in different heating circuits), then the sealant can clog the clearance in them. It's not a problem. Periodically, you will have to slightly open, and then bring these regulators to their original position. But if blockages occur constantly, then the coolant with the sealant, after reliable elimination of the leak, should be drained, the system flushed, and a new coolant pumped in.

I had one valve clogged, but was easily cleared by opening and closing. There were no more blockages, so I did not drain the sealant.

Attention!! Engine cooling system sealant can seriously damage your eyes if it gets into them. Please wear protective goggles

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Hello! I have a system of metal-plastic pipes connected on metal twists, of an open type with an expansion tank. After the second overwintering, I discovered that there was a leak in the system. It takes about 5 (maybe a little more) liters per day. Since the pipes are hidden under the screed, I can not determine how serious the leak is. According to your example, I poured liquid gas into the system. Read the answer.

Good day! And please tell me - how to add sealant to the coolant? I have a gas boiler + underfloor heating, and now the pressure began to fall on one of the circuits (entrance hall). Thanks! Read the answer.

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How does the sealing effect work?

The liquidation of the leak should not be expected immediately, but only on the 3rd or 4th day. During this time, the sealant for heating pipes will condense and close the cracks in problem areas from the inside. Eliminating the problem of coolant leakage will manifest itself in the fact that the sound of falling drops of liquid will no longer be heard in the house, the moist places on the floor will dry out, and the pressure in the system will no longer decrease.

At the same time, one of the negative effects may be a slight blockage of passages in devices for distributing the flow of coolant, as well as in thermostats. But this problem can be easily solved by periodically opening and then bringing into position such regulators in order to prevent them from further sticking.

A video lesson will help you understand how to fix a leak in the heating system yourself using a liquid sealant.

Based on the foregoing, you can be sure that the liquid sealant is undoubtedly worth it to use it to eliminate leaks in the heating system. Even though its price "bites". However, it should be understood that the hidden installation of heating pipes is not only a convenience, but also a certain risk, for which you sometimes have to pay.

What to do with a small leak in the heating system? (10+)

Repair of leaks in the heating system, heating boiler, underfloor heating

Sometimes coolant leaks can occur in the autonomous heating system. There may be several reasons. Firstly, antifreeze was poured into the system after it worked on water. In this case, the rubber gaskets and the sealing winding were first swollen with water, and then slightly dried out. Secondly, heating boilers usually consist of cast iron or steel structures connected by threaded connections sealed with sealant. During operation, the tightness may be broken. Thirdly, overheating, freezing or overpressure (too small expansion tank) in the heating system can lead to cracks in pipes, radiators and the boiler.

In the latter case, nothing can be done. Damaged equipment and piping must be replaced. In other cases, you can try to restore tightness without costly repairs.

Steps to fix leaks with liquid sealant

The procedure for using liquid sealants to repair a home heating system can seem quite complicated. In some cases, clots of sealing fluid cause partial blockage and prevent the movement of the coolant. Therefore, in order not to harm the heating equipment due to your inexperience, it is better to invite a specialist. In any case, you need to study the instructions for using a particular type of sealant for radiators and strictly follow it.

Having decided to use a liquid sealant to fix a problem in the heating system, you need to make sure that:

the cause of the pressure drop is precisely the leakage of the coolant, and is not associated with a malfunction of the expansion tank;
the selected type of sealant for heating systems corresponds to the type of coolant in this system;
the sealant is suitable for this heating boiler.

When using liquid sealant for pipes and radiators, it is important to maintain the correct concentration. On average, its values range from 1:50 to 1:100, but it is desirable to determine the concentration more accurately, since factors such as:

coolant leakage rate (up to 30 liters per day or more);
the total volume of water in the heating system.

If the volume does not exceed 80 liters, 1 liter of sealant will be enough to fill the heating system. But how to more accurately calculate the volume of water in the system? You need to calculate how many meters of pipes and what diameter were laid in the house, and then enter this data into one of the online calculators.To the resulting volume of pipelines, you must also add the passport characteristics of the volumes of all radiators and the boiler.

Preparing the heating system

Dismantle or cut off all filters with taps so that they are not clogged with a viscous solution of sealant for heating systems;
Unscrew the Mayevsky tap from one radiator (the first in the direction of the coolant) and connect a pump to it (such as "Kid");
Start the heating system and let it warm up for an hour to a temperature of 50–60 ° C at a pressure of at least 1 bar;
Open all valves on pipelines and radiators for free passage of sealant through them;
Remove air from the entire system, including radiators and circulation pump.

Sealant preparation

Drain about 10 liters of hot water from the system into a large bucket, most of which should be used to prepare the sealant solution, and leave a few liters for subsequent flushing of the pump;

Shake the canister (bottle) with sealant for radiators and heating pipes, then pour its contents into a bucket;
Thoroughly rinse the canister with hot water so that all the sediment remaining in it gets into the prepared solution.

Sealant solutions for heating systems must be prepared immediately before use so that the liquid does not come into contact with atmospheric air for too long.

Pouring sealant

Liquid sealant for heating systems must have time to mix with the coolant before it reaches the boiler, so it is more expedient to fill it into the supply:

Introduce a solution of liquid sealant into the system using a pump;
Pump the remaining hot water through the pump so that absolutely all of the sealant residue enters the system;
Release the air from the system again;
Raise the pressure to 1.2–1.5 bar and maintain the system operating cycle for 7–8 hours at a temperature of 45–60°C. This period is needed for the complete dissolution of the sealant in the coolant.

Prices

ServicePrice
Departure of the engineer during working hours from 8:00 to 22:00
Within the limits of a small concrete ring 2000 rubles.
Tariff when leaving the facility outside the small concrete ring, per km. in both directions 30 rubles.
Departure on public holidays ×1.5
Departure after office hours from 22:00 to 8:00 am ×2
Diagnostics
Fault diagnostics (up to 2 working hours) 2000 rub.
Diagnostics of malfunction (more than 2 working hours) 1500 rub. at one o'clock
Replacement/installation of gas and fuel fittings and appliances
Cleaning, replacement of the electrode with the setting of gaps 1000-2000 rubles.
Cleaning, replacement of the photocell 1000-2000 rubles.
Replacement of the furnace automatic device, combustion manager 1000-2000 rubles.
Replacing the fan 1500-3000 rubles.
Replacement of the burner servo drive (without adjustment) 3000-5000 rubles.
Replacement of the transformer 3000-4000 rubles.
Nozzle replacement from 3000 rubles.
Replacing the fuel filter from 5000 rubles.
Replacing the fuel pump of a diesel burner from 5000 rubles.
Installing the fuel level sensor
Fuel Line Bleeding
Replacement / installation of water fittings and appliances
Circulation pump from 3000 rubles.
Pumping group from 3000 rubles.
Make-up of the heating system with a pump from 1500 rubles.
Security groups from 3000 rubles.
Automatic air vent from 2000 rubles.
Servo mixer 3000 rub.
Distribution comb from 5000 rubles.
Installation of a coarse filter from 4000 rubles.
Cleaning the coarse filter from 600 rubles.
Repacking of the engineering system for 1 point from 3500 rubles.
Replacing the wall-mounted boiler pump from 3000 rubles.
Replacing the primary heat exchanger of a wall-mounted boiler from 4000 rubles.
Replacing the secondary heat exchanger of a wall-mounted boiler from 4000 rubles.
General
Repair, replacement, installation and commissioning of automation
Replacing the electronic board 3000 rubles.
Replacement of the control panel from 3000 rubles.
Replacing the thermostat 3000-5000 rubles.
Replacing a thermocouple from 3000-5000 rubles.
Thermostat replacement 2000 rub.
Installation, commissioning of weather-independent automation from 7500 rubles.
Installation, commissioning of weather-dependent automation up to 3 heating circuits from 7500 rubles.
Installation, commissioning of weather-dependent automation for up to 5 heating circuits from 8500 rubles.
Controller assembly from 6000 rubles.
Setting up weather-independent automation from 5000 rubles.
Setting up weather-dependent automation from 5000 rubles.
Connecting an additional boiler automation module from 3500 rubles.
Installation of an outdoor temperature sensor, room regulator (not including cable installation) 2000 rub.
Installing a line temperature sensor 1000 rubles.
Installation of flue gas temperature sensor 1000 rub.
Installation of a thrust tipping sensor from 1000 rubles.
Installation of a boiler body temperature sensor from 1000 rubles.
Installing a boiler sensor from 2500 rubles.
Installation and configuration of the servo from 2500 rubles.
Installation and connection of a relay-contactor from 2500 rubles.
Installation of an additional automation module from 3500 rubles.
Replacement of an additional automation module similar to the one installed from 2000 rubles.
Replacing an additional automation module that is not similar to the one installed from 2500 rubles.

The better liquid sealant for heating repairs

To repair heating, it is not always possible to use external agents. What to do, for example, if the place of the leak cannot be found, because the house had a hidden piping and a heated floor was installed? Do you really have to break the walls and open the floors? No, you don't have to! In such situations, a relatively new method of eliminating leaks is used - by pouring liquid sealant for heating pipes into the system. Such a sealant is also suitable for radiators when it is not possible to apply a clamp to a leak.

The fundamental difference between liquid sealants for a heating system is their ability to eliminate leaks not by applying to a damaged area from the outside, but directly from the inside.

The essence of this method is that in a mixture with a coolant, the sealant remains liquid, and only when it comes into contact with air penetrating into the system does it polymerize. Gradually hardening, clots of sealant are sealed from the inside of the gap precisely in those places where the integrity of the system is violated.

Several types of liquid sealants for heating are produced, each of which is adapted to specific conditions of use, in particular:

the coolant is water or antifreeze;
gas or solid fuel boiler;
heating or plumbing pipes.

You should not try to look for one universal sealant for a home heating system. It is better to purchase a specialized composition for the specific parameters of your heating system.

The most famous among consumers are liquid sealants for heating systems produced by the German company BCG. The use of these tools is considered the ideal solution for eliminating hidden coolant leaks. When used correctly, liquid sealant does not pose a danger to heating boilers and does not damage the circulation pump and measuring instruments.

Sealant for pipes and radiators must remain in the system for a long time. Once you add this sealant to the heating system, you can forget about leaks for several years.

Sealants for closed heating systems eliminate pressure losses associated only with leaks in pipes and batteries, but are powerless in cases where the membrane in the expansion tank is broken.

A set of ideas - repairs of any complexity

What are we ready to offer our clients?

Service calls throughout the Moscow region, including emergency calls.
A guarantee for the complex of work performed.
Acceptable prices.
Fast and high-quality repair, regardless of its complexity.

The experience of the specialists of the "Complex of Ideas" is a guarantee that they will eliminate any breakdown. In addition to repairs, you can contact us for help if you need to carry out preventive maintenance of the heating system and in a number of other cases. Do not put off the repair in the long box - call now!

To solve your problem, you can call a specialist. Fill out the form, briefly describe your problem and we will call you back for a consultation.

Repair of coolant leaks in a warm floor

Here is a selection of materials for you:

Everything you need to know about heating and climate control Features of the selection and maintenance of boilers and burners. Comparison of fuels (gas, diesel, oil, coal, firewood, electricity). Do-it-yourself ovens. Heat carrier, radiators, pipes, floor heating, circulation pumps. Chimney cleaning. Conditioning

After six years of operation, collets on a metal-plastic pipe began to leak. Looks like the rubber seals have dried out and worn out. And this pipe laid a warm floor throughout my house. Moreover, some connections are made so that they are available for inspection and repair, and some are inside the walls. If open ones began to leak, then surely leaks arose in hidden ones. The pressure in the heating system began to gradually decrease. I had to add water to the circuit every two days, although no water leaks were observed. At this intensity of the leak, the water apparently had time to evaporate. But I'm afraid the leak could gradually increase.

I used a liquid to fix leaks in the car radiator (radiator sealant). I took a bottle, designed for 15 liters. I have 80 liters of coolant in my system. With the next addition of water to the system, the sealant was also pumped. The leak didn't stop right away. As water was added, another bottle of sealant was added. Filled 4 bottles in total. As a result, the leak completely stopped.

Of course, there is no guarantee that such a method will help. If the leak occurs due to a large hole, then the sealant will not help. But if the leak is not very intense, 5-7 liters per day flows out, then you can try.

Types of sealants

In today's everyday life, a large number of products with sealing properties are used.

According to their chemical composition, sealants are divided into the following main types:

acrylic - unstable, do not tolerate temperature extremes;
polyurethane - elastic, have high adhesion to metals, resistant to corrosion and temperature;
silicone - the most common type of universal sealants, retain elasticity and moisture resistance in a wide range of temperatures, durable.

Heat-resistant sealant for heating pipes is used in relation to metal and polymeric materials. This tool regularly fulfills its purpose - to prevent the penetration of moisture from damaged elements of the heating system. The sealant, which is a viscous mass, quickly hardens at the site of application and subsequently withstands high temperatures.

Anaerobic adhesive sealant is used instead of linen tow and FUM tape to seal threaded joints in modern heating networks. The environmental friendliness of such a sealing agent allows it to be used not only in heating systems, but also in plumbing systems.

Sealant for heating boilers is used to eliminate gaps in places where heat resistance of the material up to 1500 ° C is required.

With the help of this tool, it is possible to close cracks in heat exchangers and chimneys of boilers and furnaces. After hardening in the seams between surfaces made of different materials (metal, brick, concrete), the substance retains its tightness.