During the operation of heating systems, extraneous sounds periodically arise that should not be there. These noises are generated due to the following reasons:

• uneven movement of the coolant caused by changes in speed and pressure;
• malfunctions of installed pipeline fittings;
• incorrect settings of equipment and pipeline fittings.

And if, during the operation of the heating system, noise appears in the heating pipes, then the first step to eliminating it should be a correct diagnosis.

Classification of extraneous noise

All extraneous sounds can be classified as follows:

• crackling noise coming from heating pipes. It usually appears when heating is put into operation;
• clicks that appear with a certain frequency;
• hum in the pipeline system;
• knocking in the heating pipes in the apartment.

All of these noises not only reduce the comfort of staying in the house, but also clearly indicate the objective reasons that serve to cause them.

If they are not eliminated in time, then you can expect troubles in the form of damage to the batteries, installed pumps and valves, up to a complete stop of the heat supply.

One of the main causes of noise in the heating system is water (coolant) leaks from the pipeline. You cannot eliminate these defects in an apartment building on your own; they must be reported to the management company. Its specialists must inspect all rooms located in the building for coolant leaks. As a rule, sources of leaks are flanged or threaded connections, valves, valves and fistulas formed during operation. If the inspection does not produce results, then it is necessary to check the entire heating system and the units installed in it.

A knocking noise in the heating pipe of a private home may come from the heating pump.

It should only be removed by specialists who have special skills and tools.

In addition, individual devices installed in the heating network, for example, a drain valve or an air vent, can generate knocking noises in heating pipes in a private house. Modern heating systems are assembled in such a way that the main pumps, control valves, control and automation equipment are located in one room and it makes sense to immediately conduct a full inspection.

Extra sounds from heating appliances

The next source of noise and knocking in the heating pipes of a private house is heating radiators. As a rule, the cause of their occurrence is errors made during installation or defects in the housing. In the latter case, it is advisable to change the battery.

If the radiator is not damaged and its installation was carried out strictly according to the rules, then the cause of noise in the pipes may be the presence of an air lock in the radiator.

Its presence creates an obstacle to the movement of the coolant and at the same time a hum appears.

In addition, an unreasonably large number of fittings built into the heat supply system provokes unnecessary noise. The battery can become a source of hum and knocking in the heating pipes of a house due to improper installation, and the vibration that occurs when the coolant moves is transmitted throughout the pipeline. And of course, one of the reasons that can contribute to noise is debris accumulating in radiators.

Cleaning the heating radiator from deposits

By the way, another reason may be that when installing pipelines, transitions from one diameter to another are used too often. Using these nuances results in the flow of the work environment slowing down or speeding up.

These are the main reasons for the appearance of extraneous sounds in heating radiators.

Air is removed from radiators using a Mayevsky tap. This operation is carried out when filling the heating system with coolant, before the start of the heating season. If such defects appear during operation, you will have to stop the heat supply to the building or, at least, reduce it and wait until the temperature drops to 30 degrees. After this, you need to open the tap and wait until the air comes out of it and the coolant begins to flow out. Typically this procedure lasts one to two minutes, but this depends on the volume of the system. After this, the heat supply is turned on again and if the noise disappears, then all work has been done correctly and the air lock has been removed from the system. Mayevsky taps are installed at the highest point of the heating system.

By the way, the presence of air indicates that coolant leaks have formed in the heat supply system, which urgently need to be found and eliminated.

Debris in the radiator

One way or another, debris accumulates in the radiators - these are small particles of rust, limestone sediment, etc. You can check its presence after dismantling the mesh filter; if particles of rust and plaque are visible in it, then, most likely, debris has accumulated in the radiator .

In this case, to eliminate knocking in heating pipes in an apartment, two methods are used. The first method is called hydrodynamic, the second chemical. When using the first method, a powerful pump is used that creates high water pressure. But at the same time, we must remember to limit the operating pressure in the system. If it is exceeded, radiators and other elements of the piping system can be damaged.

The second method implies that special chemicals dissolve the particles or destroy them, after which they leave the system under coolant pressure. But before you engage in chemical cleaning, you must read the instructions very carefully. Phosphoric acid may be used in some formulations. When using it, increased safety precautions must be observed.

Excessive noise in pipelines

Excess noise in heating pipes appears due to:

• incorrect operation of the circulation pump;
• presence of debris in pipes;
• design errors;
• improper installation of the structure.

Sometimes these problems can appear simultaneously, and sometimes all together. In this case, the diagnostic task becomes more complicated. The cause can be identified first of all by the nature of the sound. For example, clicking sounds indicate a blockage in the heating pipe. A blockage in the pipe can significantly reduce its internal bore diameter.

This leads to an increase in operating pressure in a certain section of the pipeline and, as a consequence, to the appearance of excess noise.

A cracking sound indicates that the air valve has most likely failed. It needs to be tested and replaced. Vibration, which also creates extraneous noise, occurs in improperly installed heat supply systems. That is, the passage of the working medium can cause the pipe to vibrate and, if installation rules are not followed, it may hit the wall.

To avoid clogging, all heating supply components are washed either before the start or at the end of the heating season.

Pump noise

Above were descriptions of the causes of extraneous noise and knocking in heating pipes. A private house or high-rise building has a heating system consisting of passive and active parts of pipeline fittings. But, these noises can also be created due to malfunctions in the operation of pumps, valves and other equipment operating from an electric drive.

In the event of partial failure of the impeller or rotor, vibration occurs during pump operation. Moreover, when operating a defective engine, the operating parameters of the system, that is, pressure, may deteriorate. This defect can be eliminated either by repairing or replacing the pump. Which is not difficult to do even during the heating season.

Typically, two pumps are installed, one is considered the main pump and the other is a backup.

And one of them can be cut off from the coolant supply line for some time.

By the way, unstable operation of the pump can also be caused by errors in the design or flaws during the installation of the heating unit, more precisely, in its electrical part. If electricity is supplied to the power plants with insufficient parameters or phase imbalance, then you can be sure that the movement of the coolant will be uneven. Accordingly, this will lead to noise and knocking in the heating pipes when the coolant is heated.

In addition, extraneous noise and knocking in heating pipes in a private house may occur for the following reasons:

• violation of the rules for installing the pump; its shaft must be positioned strictly horizontally;
• discrepancy between the technical parameters of the installed pump and the design parameters.

In the first option, runout of the pump shaft may appear; in the second, a change in technical characteristics leads to an increase or decrease in the flow rate of the working fluid.

Diagnosing the source of noise and knocking in heating pipes in a private home is a difficult job. To perform this, you must dismantle the pump and have certain skills in working with various tools. As a rule, diagnostics are performed by trained plumbers.

Noise in boilers

Boilers that produce heat, like any other equipment in the heating system, can also generate knocking noises in heating pipes in a private home. As a rule, the reasons for their appearance are similar to those that cause extraneous sounds during operation of pipes and radiators. These are lime deposits and debris getting into the heat exchanger.

If cleaning the boiler does not bring a positive result, then it is necessary to look for the causes of noise in other components. In addition, they indicate errors in the operation of the boiler itself.

In any case, boiler maintenance and repair work should only be carried out by trained specialists.

Causes of noise in different types of boilers

In practice, four main types of fuel are used:

• solid – coal, wood;
• gas - liquefied gas, propane;
• liquid – diesel fuel;
• electric.

Each type of boiler has its own disadvantages. Thus, when boilers operate on solid fuel, the pipe becomes clogged and, as a result, the draft decreases. This is the reason for the appearance of abnormal sounds; to eliminate them, it is necessary to clean the chimney in a timely manner.

Boilers that use diesel fuel may whistle.

This occurs due to incomplete combustion of the fuel and a large amount of soot forms on its injectors.

Theoretically, using the methods described in the technical description, you can clean the boiler combustion system yourself. As a rule, the documentation describes the frequency of cleaning, the order of actions performed and the tool required for this.

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Noisy batteries - unnatural phenomenon causing significant discomfort to residents of a private home. The volume of crackling, splashing, and gurgling noises is not always evenly distributed throughout the system.

Some rooms of the house do not suffer, while in some rooms it is simply impossible to be present. The problem is aggravated by the use of metal elements when installing radiators - metal conducts vibrations well, making the hum loud and widespread.

Identifying the cause of noise is a priority task, since extraneous sounds indicate disruptions in the functioning of a system that is vital in the cold season. Some of the reasons left unattended will lead to to failure of the heating circuit, accident or major material damage.

Why do heating radiators make noise in a private house?

Batteries in a private house are noisy for different reasons. The breakdown can be corrected only after it is known exactly why the radiators are noisy.

Overpressure

Radiator noises caused by excessive pressure inside the entire installation indicate about the danger of a breakthrough.

Technical communications are designed for a certain operating pressure, which is controlled using sensors - pressure gauges.

Based on the standard indicators specified for a specific circuit of heating systems, you can adjust the pressure pumped by the pump, on one's own.

Incorrect installation of thermal valve

The home master does not see the difference which side to install the battery shut-off valve. But if the thermal valve is installed incorrectly, hot water pressure at valve, causing noise. Such a crane can tap periodically.

Pump noise in the boiler room

Previously, it was customary to place injection equipment in a separate building to reduce the volume of the sound it produces. Modern pumps are located in the basement of private houses.

Their work has been improved to such an extent that maximum efficient use of the heating circuit is possible with minimal hearing discomfort.

Photo 1. Pumps in a boiler room located in a semi-basement room can cause vibration and noise from radiators.

But incorrectly selected for a specific home pump power is reflected in the appearance of constant noise from radiators and pipes. Metal communications perfectly convey vibrations of a powerful supercharger throughout the private house.

Attention! To prevent this effect, you need to adjust (reduce) the power of the pump, and before installing it coordinate its performance with specialists.

Incorrect boiler operation

Monitoring the correct functioning of the device eliminates the hassle of battery operation and failure. The first sign of problems with the boiler functions is the appearance of extraneous sounds.

To eliminate the defect, the modes of turning on and off the heating apparatus are adjusted.

Frequency of mode changes occurs once every 20-40 minutes. Good performance indicators - 75-80% of the boiler's rated power.

A good solution to the problem is to install automatic room regulators that independently control the boiler power by measuring the temperature on a specific radiator.

Uneven supply pipes

When installing a system of “communicating vessels” in a private house the laws of hydrostatics are strictly observed. All installation work is carried out using a level - a device that controls the parallelism and perpendicularity of the heating circuit elements to the level of the earth's surface. Pipes installed at an angle create unnecessary drop in water level, provoking splashing inside them.

Battery displacement when heated

The radiator is attached to the wall using special brackets made of metal with lower thermal conductivity than the batteries themselves.

This protects the stands from unnecessary heating, which reduces the temperature of the entire heating system of a private home.

Bracket material undergoes little thermal expansion.

And heating radiators are sensitive to changes in coolant temperature. High thermal conductivity material expands significantly when heated. The junctions of such different elements often crack and click.

Reference! To prevent contact of parts, the occurrence of noise and subsequent corrosion of the metal in these places of the battery, elastic gaskets are used. Best fit rubber washers.

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Change in coolant temperature

Failures in the operation of the circuit system also occur due to discrepancies in the power of the heating unit.

The degree of heating in the battery is adjustable, but it is better to carefully select all elements of the heating system in advance.

If the boiler is designed by 2 kilowatts, and the total power of the radiators is 1 kilowatt, then this will periodically lead to malfunctions in the circuit, voltage in the pipes, and noise.

The material from which the batteries and pipes are made is also taken into account. Previously used cast iron, which withstood changes in the heating system.

Now other materials are common, less resistant to increased temperatures, although more attractive due to other characteristics.

The radiator clicks and knocks: causes of crackling, knocking and clicking

Specific sounds in the heating system are created when there is foreign particles. Many people reject this possibility, since the heating circuit of a private house is looped and represents closed system with a small coolant turnover. But the appearance of debris in batteries, which causes them to knock, is a cumulative phenomenon.

The water used for heating does not pass through filters, but is taken from a regular water supply. With constant heating, metal salts settle on the walls of pipes and batteries, forming scale.

Tearing off under the pressure of water, the particles move from place to place, as if they click.

For a private home, eliminating the problem of cracking, knocking and clicking in the battery is much easier than for an apartment building. Almost any owner can do this on his own. Coolant through the valve drains into the sewer. The heating circuit and adjacent communications are washed with clean water. Then the coolant is replenished again.

If the valve malfunctions, it is enough simple replacement of an obsolete element.

Murmuring of water in batteries and methods of elimination

Water in batteries can gurgle for various reasons. To determine, you need to know feature of radiators.

Leaky connections

Air bubbles create splashing and murmurs that frighten the owners of the house. The main reason for the appearance is the lack of tightness in threaded connections. Heating circuit sucks air almost always in such conditions. A kind owner knows this feature and controls condition of valves, pipe joints for integrity and tightness.

Photo 2. Leaky battery threaded connections create gurgling sounds, so you should always check the joints.

Bleeding air when unpleasant “symptoms” appear is a reliable way to avoid discomfort when operating water heating devices in a private home. In the presence of Mayevsky cranes You can quickly bleed air from a separate battery. The “culprit” is determined by palpation. The radiator in which air has accumulated loses temperature, gets cold at the top.

Poor removal of air from the system before starting

Be sure to carefully deflate when commissioning the heating circuit. Heating branches extend from the boiler, each of which has a circulation pump installed. Required on the front side of the pump unscrew the screw. Then the water will begin to drain and the air will bleed out.

During the procedure it comes out about ten liters of coolant. To ensure that the automation does not block the operation of the boiler by reacting to a sharp drop in pressure, the system is simultaneously recharged with an additional amount of liquid.

Error in installing the heating system

The heating circuit in a private house is a serious communications scheme. It is forbidden to install its elements without following strict rules.

It happens that after installation, heaters and radiators crackle and click. What is the cause of extraneous noise during operation?

Causes of noise in a heating radiator

The reason for knocking and noise in batteries is mainly due to violations committed during installation. The most common problems are:

• Different diameters of the radiator inlet and hose. Modern systems use control valves, a Mayevsky valve, a bypass, etc. All pipes and shut-off valves must have the same internal cross-section.
• Lack of differential pressure regulator. A special washer is installed in front of the regulator nozzle in the basement of an apartment building, designed to stabilize the pressure. If there is no washer, the coolant makes noise in the batteries when the pressure in the pipeline reaches above 1.5 Bar.
• Heating radiators crackle due to incorrect connection of the thermal valve or poor mounting on the brackets. The problem can be resolved by replacing the temperature controller. Water presses on the valve in the thermostat, which leads to extraneous noise. The cause of the crackling sound is also insufficient fixation on the brackets. When heated, the metal from which the radiators are made expands, which leads to noise.
• Air pockets - if water is bubbling in the radiator, this indicates the presence of air in the system. When water passes the location of the plug, a sound similar to the babbling of a stream is made. A similar problem is detected if the batteries gurgle when the heating is turned on. The situation is corrected using the Mayevsky crane. By bleeding air from the heating system, you can achieve silent operation.
• Leak in the system. Whistling and humming indicate a lack of tightness in the heating system or excessive narrowing of the pipeline. Moreover, the heating radiator is humming due to a “fistula” in the riser not only in the apartment itself, but also in the basement. If a visual inspection does not reveal the location of the break, the building management plumbers are called to look for a broken pipe in the basement.

These are the most common causes of noise during heating operation. To determine what became the catalyst for the violation, the location and localization of knocking, gurgling or other sounds should be determined. After this, identify errors in installation.

Eliminating noise from radiators is much more difficult than preventing them from appearing. Therefore, it is recommended that the installation of the system be carried out by a qualified installation team.

Why does the heater crackle when operating?

The causes of noise in electric heaters, unlike radiators connected to a liquid heating system, are rarely associated with installation errors. The main cause of clicks, crackling and other sounds is violations of operation by the owners themselves.

• Oil radiator– if clicking sounds are heard when you turn on the heater, the problem is due to moisture getting into the oil. This happens for several reasons. The heater was turned upside down during transportation. We transported the heater in winter, and then immediately turned it on, etc. Detailed instructions on how to avoid unpleasant noise can be found in the heater instructions.
• Fan heater and convector– noises indicate accumulated dust. The heating process involves the use of an incandescent filament. The settled dust causes unpleasant clicking sounds during operation, usually accompanied by a burning smell.

Qualified specialists must eliminate the causes of crackling and clicking noises in radiators and electric heaters. Regarding electrical equipment malfunctions, you should contact the service center. A competent plumber can eliminate violations that cause radiators to knock, make noise, or creak during heating.

In multi-storey buildings you can hear various extraneous sounds, especially when the walls in the apartments are not sufficiently soundproofed. It is not uncommon to hear knocking on pipes and a crackling sound in the heating system. Such phenomena indicate unstable operation of the heating supply structure or the presence of malfunctions in it.

Common causes of noise

Since in most cases, pipelines and radiators in houses are made of metal, which is a good conductor of sound, the source of noise in the heating pipe can be quite far away. Most often the problem is that the equipment is not being used correctly.

The main reasons contributing to the appearance of extraneous sounds in heating systems in the form of knocking or vibration are:

1. One of the pipeline elements is clogged.
2. Severely worn structural parts.
3. Violations of the rules for arrangement and operation of heating equipment.
4. Presence of air pockets.
5. Too weak or, on the contrary, too strong a pressure.
6. There is a leak in the system.
7. Due to a breakdown or incorrect selection, the pump makes noise.
8. Errors were made when selecting the technical characteristics of the equipment.
9. There is insufficient coolant volume in the system, so you can hear water flowing.
10. Sound insulation is broken and building codes are not followed.
11. The regulator is incorrectly selected.
12. There is a significant pressure drop in the system.
13. There is no room for a pipe passing through a wall to expand as it heats up.

If there is water noise in the heating pipes in an apartment building for just a few hours, this may mean that repair work is being carried out on the system.

Noise in radiators

To correctly diagnose the causes of noise in the battery, you should make sure that it is in normal technical condition. Often, when inspecting the radiator, damage is discovered. In this case, it should be repaired or replaced with a new device. If there is no obvious damage, it is necessary to determine the type of noise. Most often you can hear a hum and/or clicking noise in the radiator.

Their causes include the following common problems:

1. Incorrectly installed battery.
2. When moving, the water flow transmits vibration to the radiator, which in turn transmits vibration to the mounting units located in the wall.
3. There is a foreign object inside the device. Often, once it gets into the system, it settles in the battery. Either this item was there initially and was not removed during installation.
4. Air has entered the radiator. This causes the noise of flowing coolant or hum to appear in it.
5. Incorrect functioning of the thermostat. The reason for this is the displacement of the shut-off rod.

You need to start fixing problems only after correctly diagnosing them. If the cause of extraneous noise is in the central heating main, you must contact the management company. When extraneous sounds are heard for a long time, you should call specialists to carry out diagnostics.

Presence of noise in the heating system pipes

When noise is detected, especially if heating pipes are cracking and there is a hum, the reasons may be complex.

It is quite difficult to immediately understand the sources of sounds, since they can overlap:

1. If there are clicks in the heating pipes, they are often caused by a blockage that has formed in the system. Most likely, the lumen of the pipeline has narrowed and following this, in a separate section of it, the pressure becomes higher, then it drops, and the presence of such a difference makes itself known.
2. In the case when heating pipes crack in a private house, the malfunction is associated with the air valve. It should be checked and, if necessary, replaced with a new product.
3. When the pipe vibrates, then an error was made during installation of the system, and it may hit the wall. If a problem is detected inside the structure, it needs to be flushed to solve it. If the cause of vibration is located outside the pipeline, additional absorbers and fasteners should be installed. If there is a problem with the pumping equipment or mixer, they are either repaired or replaced.

Heating pump malfunction

If the radiator and pipes are working properly, and the cause of the problem is related to the pump, it should be diagnosed. Most often, noise is caused by a faulty rotor or impeller. The entire heating system suffers from this and its efficiency begins to drop. Repair or complete replacement of parts can solve the problem.

The noise from the circulation pump is sometimes caused by external reasons, for example, a voltage drop. As a result, imbalance occurs, synchronization is disrupted and the coolant begins to move unevenly. This causes noise to be heard both in the radiators and in the pipes. The diagnosis must be carried out by a specialist.

But in some cases, even during stable operation of the pump, noise and vibration occur, then you need to check:

• whether the equipment power corresponds to the initial calculation results. If not, then the coolant moves through the pipes either too slowly or too quickly and creates different types of noise;
• correct installation. First of all, you need to check the location of the rotor of the device. It must be in a strictly horizontal position.

Extraneous sounds in heating boilers

Noises heard in heating boilers arise for the same reasons as in the case of pipes and radiators. Most likely, they appeared as a result of clogging of the heat exchanger due to lime deposits. The design feature of the unit plays an important role. If the problem is a clog, it needs to be removed. When cleaning does not help, you should further look for the cause of the problem, but the best solution would be to call a specialist.

When determining the noise problem in the boiler yourself, you should take into account the peculiarities of its design and the fuel used:

1. Gas unit. Perhaps the whole point is that the burner is not functioning evenly. Such a problem as knocking in the gas pipe appears in already outdated boiler models that do not have additional control over the flame. In this case, it is advisable to update the device so that it meets modern standards.
2. Solid fuel boiler. Extraneous sound may come from behind the chimney. As a result of prolonged use, it begins to become clogged and the traction force decreases. The chimney structure needs to be cleaned.
3. Diesel appliance or apparatus operating during mining. A whistling noise is heard from the injector nozzle and should be cleaned.

It should be borne in mind that the cause of extraneous sounds may not be one fault, but several. Therefore, comprehensive diagnostics of the heating unit should be carried out.

Use of vibration compensators in heat supply systems

It is possible to ensure noise insulation of pipes by installing vibration compensators. In the presence of vibration and water hammer, the installation of special flange elements will help solve the problem. They are designed to eliminate mechanical stress and protect the heating system from unwanted loads.

If a vibration compensator is installed in a private household, then this should be done near the pumping equipment. When the problem occurs in an apartment building, these devices are installed near the central riser from which the coolant flows, or near the wall partitions.

Installation is simple and many property owners can handle it themselves. This method of sound insulation eliminates the main noise irritants transmitted through pipes.

If you have not been able to deal with the problem of noise in the system on your own, and the heating pipes in a private house are still clicking or there are hums and clicks in the radiator, you should dismantle the heat supply structure and install it again, but with the help of specialists.

In conclusion, it should be noted that it is impossible to foresee all problems with the heating system, and individual cases may generally be unique.

A common phenomenon that can be encountered in apartment buildings or private buildings is various types of noise emanating from the heating system. Like any excess noise in communication systems, humming, crackling or knocking in heating pipes have their reasons, and if they are not eliminated, along with psychological discomfort for residents, this can lead to serious problems in the heating system of a residential building.

Characteristics of noise in heating pipes

When talking about unwanted noise effects in heating system pipes, we should first mention a few words about the difference between noise and sound. If sound waves are characterized by a certain frequency and amplitude, then noise vibrations are characterized by randomness, lack of uniformity and rhythm. The noise level is measured in decibels, and its normal values ​​are up to 30-40 decibels in an apartment and up to 45-55 decibels on the street. Anything that exceeds this level is a deviation from the norm and causes acoustic and psychological discomfort to a person.

Installation of communication systems in a home is carried out in such a way that the noise emanating from them is not felt by residents and falls within the framework of sanitary standards. This also applies to heating pipes, and therefore the appearance of hum, crackling, knocking and other audible noises in them indicates a problem with the heating system.

As an exception, it is worth mentioning the noise that occurs in heating communications during the first start-up of the system. This kind of knocking or crackling noise in heating pipes is not unusual - it is usually associated with pressure drops in the supply and receiving pipelines when water is first supplied to them. Subsequently, as all pipelines of the system are filled with water, the noise in them weakens and then stops completely.

Noise effects resulting from malfunctions in the system can be of various types: hum, crackling, clicking, knocking, bubbling, etc. Their reasons may be related to errors made when installing heating pipes, or may arise during operation (read: " "). Noises of different natures have different origins, and therefore identifying the type of noise plays an important role in establishing its causes.

Causes of humming and whistling in heating system pipes

Whistling or humming in heating pipes is quite common, and among the main factors for their occurrence are the following:

• leaks in the heating system;
• the appearance of narrowings in the lumen of the pipes, interfering with normal water circulation;
• the use in some apartments or premises of a residential building of pipes of a smaller diameter than in the rest of the heating communications.

If the reason for the humming pipes is unclear, you should first find out if there are any leaks in the heating system. For this purpose, it is necessary to inspect all apartments and rooms in the house, but if a water leak is not found in them, then also the basement, in which the main plumbing and heating structures are usually located.

Most often, leaks form in fistulas of heating pipeline structures or in valve connections. If such a leak does occur, it is usually not difficult to detect it with careful examination: as a rule, a small stream of water flows from the problem area and a small cloud of hot steam comes out. A stream of water can be detected at some distance from the leak site, and the hum of pipes can sometimes spread over quite significant distances.

If a careful audit reveals that there are no leaks in the system, then another likely cause is a decrease in the flow of pipes in a certain area. The location of this defect is determined by ear by examining the entire heating system. The identified problem area must be replaced. In any case, to repair and restore the damaged area, it would be correct to call a plumber, since this task may not be possible for a non-specialist.

Why do you hear clicking, crackling and knocking noises?

The appearance of clicking or crackling noises in the heating system pipes usually indicates that foreign solid particles have appeared inside the communications. The impact of such small particles on the pipe walls is the direct cause of such noise.

As a rule, heating pipes knock and click when the following problems occur:

• wear of some key elements of the system;
• valve valve malfunctions;
• expansion of metal heating pipes under the influence of heat.

In most cases, knocking in the heating pipes of a private house or apartment building can be eliminated by simply draining the clogged water from the heating system and replacing it with clean water. If such flushing does not eliminate noise, then the faulty parts of the system must be replaced. In particular, valve valves are subject to inspection, problems with which are often the cause of such noise.

Another reason for knocking in heating pipes may be the thermal expansion of metal pipeline structures. Usually in this case, the crackling and knocking noises are quiet and intermittent. The expansion of pipes can lead to slight movements and disruption of the fastening of some structural elements, which leads to noise of this kind. To solve this problem, it is necessary to inspect the places where various parts and elements are fixed, and, if necessary, re-fasten them.

Finally, another reason that can lead to clicking and knocking in heating pipes is the so-called water hammer. It occurs when the water circulating in the pipes is instantly shut off by closing the valve, valve or tap. Since the compressibility of water is practically zero, and stopping the water stream cannot happen immediately, for a short time, at the point where the tap is suddenly closed, the pressure can jump by tens of atmospheres. This can lead to malfunctions of valves, valves, threaded connections with clicking or crackling sounds, and even failure of some parts. Therefore, to avoid this, you should not suddenly shut off the flow of liquid circulating in the heating system.

Seething water in heating pipes and radiators

Sometimes you have to deal with a problem such as bubbling or gurgling water inside heating lines. This noise occurs due to the appearance of air bubbles inside the water. In addition to noise effects, another undesirable consequence of this problem is a decrease in the temperature of the coolant and the efficiency of the system as a whole.

If seething or gurgling noises occur, the system should be checked for the presence of slopes and distortions, in which a layer of air can form and stagnate. In some cases, to remove air bubbles from the heating system, special air vent valves are installed in the structure on the upper floors. In other cases, it may be necessary to correct distortions and slopes, which requires shutting off and stopping the heating in the entire house.

Other sources of noise in the heating system

In addition to the reasons mentioned above, the following factors can be sources of various noises in heating communications:

• sudden pressure surges for one technical reason or another;
• non-compliance of the coolant with technological standards;
• noises coming from pumps in the boiler room.

To prevent sudden pressure changes in heating systems of private or apartment buildings, it is recommended to install special control devices. Sometimes the noise can be caused by pumps located in the boiler room, the operation of which can lead to resonance in the water-jet elevator of the heating system. In some cases, the resulting buzzing or crackling can be eliminated by installing a valve between the elevator and the pipe.

To prevent noise in heating pipes, it is recommended to avoid using threaded valves, and instead install ball valves that close the water flow by turning 90°. They are much more reliable for such systems, and their operation is almost unaffected by coolant flows or other mechanical factors inside the structure.

Boiler equipment used to equip heating systems can operate on various types of gaseous, liquid or solid fuel, or also on electricity. However, the operation of boilers of any type may be accompanied by certain side processes, which often affect the heating system and can cause noise in it.

In particular, wood or coal solid fuel can lead to clogging of the chimney with a decrease in draft force. The operation of boiler houses using liquid diesel fuel may be accompanied by incomplete combustion and accumulation of soot. All this often leads to noise and humming in heating communications, and requires measures to eliminate these problems.

Noise may also appear due to malfunctions of pumps, valves or other devices and mechanisms located in the boiler room or basement. The solution to the problem in such situations is to repair faulty elements or replace them.

In general, any specific situation with the occurrence of noise in the heating system requires an individual approach, and there cannot be universal methods here. In some cases, identifying and eliminating faults on your own can be very difficult, and in this situation, the only way out of the situation is to contact qualified specialists.