Key for bleeding air from the battery. How to bleed air from a heating radiator of a central and autonomous system

Before starting heating system it is important to prepare it correctly. If a person lives in a city high-rise building, this problem is unlikely to affect him. After all, the employees of the housing office are responsible for carrying out such a procedure. But the owners of the private sector start the heat on their own. But even in the period heating season batteries may not heat well and may even be cold in some places. The system is probably airy.

In any case, you need to know how to bleed air from a heating radiator in order to avoid situations associated with ineffective equipment operation. Why there is an airlock, its consequences for the operation of the heating device, what are the methods for removing it - you can find out about all this by reading the article.

If an air vent appears in the battery, nothing good will come of it. Excess air is an obstacle to the normal functioning of the system. It can also cause corrosion on the radiator walls.

If installed in the circuit, an air lock can disrupt its operation. When the system is functioning correctly, the sleeve bearings on the shaft of the pump unit are constantly in the water. And in the presence of an air supply, the effect of "dry friction" occurs, which negatively affects the sliding rings, and can damage the shaft. Therefore, it is important to know how to expel air from the home heating system. Measures taken in time will help prevent damage to the heating network.

How do you know if there is an airlock in the battery?

Before you release air from the heating system, you need to figure out why it is formed in the circuit and how to understand that there is an air lock in the radiator. Most often, excess air accumulates as a result of improper filling of the system with water. The reason may also be the result of mistakes made during installation. Low pressure in the circuit, low-quality coolant with the presence of dissolved oxygen can also lead to airing.

An airlock can also occur under the following circumstances:

The fact that excess air has accumulated in the system may be indicated by the following signs: hissing and gurgling sounds in the battery, the quality of heating decreases, heating becomes uneven, the radiator may be cold in areas where air is present.

Such situations are not uncommon. Surely every owner of an apartment or private house has faced a similar problem. Therefore, it is important to figure out how to remove air from the heating system of a house, especially since it is not at all difficult to do it yourself. It should be noted that most often an airlock is formed in the batteries that are installed on the upper floors of the house.

Important! Sometimes the cause of plugging is a poor quality radiator.

In this case, no matter how much excess air is released, it will form again. And the reason lies in the fact that the material from which the battery is made contributes to the formation of gases. There is only one way out of the situation - to buy a new radiator. Therefore, it is better to immediately purchase heating devices from bona fide manufacturers.

How to remove excess air from the battery?

Before you bleed the air from the heating system, you need to understand well the features of this procedure and prepare everything necessary tools and materials. Let's consider how to remove air from the heating system in more detail. For such work, you will need a special key with which you can open the air valve on the radiator.

A radiator wrench works best. It is sold in any hardware store. If a modern battery is installed, you can use a simple screwdriver. It is also necessary to prepare a container into which the coolant will be drained. And also have a couple of rags nearby in case of unforeseen situations.

The algorithm of actions on how to properly bleed air from the heating system is given below:

In addition to Mayevsky's taps, automated air vents are often used for heating systems, which release excess air on their own. Such automatic units are compact and reliable. But at the same time, you have to be extremely careful. After all, the valve works unattended. And the slightest violation in the process can cause heating of the attic or riser.

Some nuances

There are situations when the masters, when installing the heat supply system, do not install special valves to release excess air. Consider how to release air from the heating battery in this case. For work, you will need an adjustable or gas wrench. With its help, you need to unscrew the plug. This should be done very slowly. Sometimes the plug won't unscrew. Most often this happens if. In this case, it is necessary to apply a special lubricant to the thread and after a while try again.

When the cap is unscrewed, the same sequence of actions is performed as with a conventional tap. When the plug is screwed into place, remember to wind either FUM tape or flax onto the threads. This will avoid leaks and will seal the connection.

If air has accumulated in the heating system of a private house, the water will have to be drained using an expansion tank.

This tank is always located at the highest point of the heating system. When the water is drained, you need to wait a little, and then unscrew the tap on the expansion tank. Usually, when the temperature of the battery rises, the plug comes out on its own. If such actions turned out to be ineffective, then you should bring the water in the circuit to a boil. In this case, the cork will definitely come out.

How often should the air be deflated?

Knowing how to bleed air from the heating system can prevent and solve many problems. But how often should such a procedure be carried out in order to prevent it? As a rule, this should be done at the beginning of the heating season. Two times is quite enough (the first time for checking, the second for checking). Of course, if the system has defects or it is faulty, then the number of descents can be large.

If they are installed in the apartment, then before starting the system, it is necessary to drain the water. This will help increase battery life dramatically.

Preventive measures

Of course, knowing how to blow through the radiator is important and necessary. But it is better that the airing of the system happens as rarely as possible. Better warn this situation and install an air vent.

On this moment air collectors of heating systems can be of two types: manual (represented by the Mayevsky crane) and float (or automatic). Each of the above types can be installed in various places where there is a danger of air intakes. The configuration of the Mayevsky crane is traditional. Air vents can be angular or straight.

In order not to puzzle over how to air the heating system, it is imperative to install an air vent on each battery.

Manual Air Vent Type

Manual type air vents are usually mounted on the front side of the radiator. With their help, you can easily bleed off excess air. It is enough to have only a special key. The performance of such devices is low. Therefore, such an air collector for the heating system is installed only for use at home.

Automatic air vent type

As for the air vents automatic type, they function offline. You do not need to unscrew, open anything. The device does everything on its own. They are mounted strictly in a horizontal or vertical position. But I must say that such a valve for bleeding air from the heating system has one drawback - high sensitivity to pollution of various nature. Therefore, you will need to additionally install a filter that will clean the device from mechanical impurities.

Important! If air has formed in the heating system, you should find out the reason for this situation. Especially if there were no such problems before. It is important not only to remove the airlock, but to take all measures so that it does not reappear. Therefore, it is necessary to check the device for leaks. Perhaps somewhere you should change the nuts or tighten the bolts, better seal the joints. Or perhaps the air vent is installed incorrectly or the automatic heating air separator is out of order.

Outcome

Summing up, we can say that the problem of airing the system is quite urgent. It can occur both in urban high-rise buildings and in private houses. There can be many factors for the formation of excess air. It is very important to establish the true cause and know how to release air from the heating radiator correctly so that such situations do not occur in the future.

An important role in a serviceable and effective work radiators plays and the installation of special air vents. Having installed such a device, the owner of a house or apartment will be able to forget about the problem of the appearance air congestion, will save time and money, as well as extend the service life of the entire heating system.

It would seem that it could be easier to drain water from the heating system? After all, for this it is enough to connect to the battery drain hose and open the water. However, an incorrectly performed operation can lead to the most unpleasant results, especially in the event of unforeseen situations in apartments, where you can simply pour water over all the neighbors. We will talk about the rules for removing liquid from the heating system in this article.

We drain the coolant in the apartment correctly

You should only interfere with the operation of the heating system if such actions are necessary for the normal operation of communication, prevention or elimination of breakdowns. For example, it is impossible to replace a radiator in a room without first draining the fluids. In addition, it is necessary to remove liquid from the pipes in case of leaks, contamination of the system and, if necessary, replace the coolant with a new one.

In an autonomous home heating system, it is easiest to drain the coolant. To perform such work, no special permits and approvals are required, since even the occurrence of unforeseen situations in this case cannot cause significant harm to people. To replace the coolant, we perform the following work:

1. turn off the heating boiler;
2. we wait for the complete cooling of water in the system;
3. shut off the valve for making up the system with cold water;
4. we open special air valves, which are necessarily present in closed communications.

Modern heating networks have drain taps, which are located at the lowest point of the system - usually on the return pipe in the immediate vicinity of the boiler. After completing the above operations, connect a hose to this tap through which water can be drained from the circuit. When there is no coolant left in the heat supply network, you can start repairing the communication, replacing its damaged elements, or any other work for which the drain was performed.

Properly drain water from pipes and batteries autonomous system it is more difficult if a "warm floor" is installed in the house. In this case, to remove the coolant, you will have to connect a compressor to the inlet of the network, which will help to displace water from the pipes using air pressure. Although it is far from always necessary to completely drain the water from the system. For example, if you need to replace only one heating battery in the house, you can drain the coolant only from it, of course, if the design of the system and the features of its installation allow it.

It is highly desirable to provide for the possibility of draining water from a particular radiator by installing valves and taps.

So that when the described recommendations are followed, the replacement of the coolant does not cause big problems, it is necessary to prepare a container of a suitable size in advance. All the liquid from the autonomous heat supply should fit into it without a trace. In some cases, you can simply use a long hose that is pulled from the heating drain valve to the street. However, the longer the hose is and the older it is, the higher the likelihood of leaks during the repair of the heating network.

Drain the heating medium from the heating system located in apartment building is much more complicated. If you need to remove water from the communication in order to modernize it, you will have to free the entire riser from the coolant, passing through all apartments located in the same vertical. Such repairs require prior agreement with the company serving the heat supply of the apartment building.

The service of draining water from the riser is paid, it is performed by the employees of the responsible company, its cost depends on the time of the repair. The most expensive drain in winter period during the heating season, and cheapest in summer. Therefore, you should plan in advance for the modernization and maintenance of heating elements.

How to replace a radiator - dismantling procedure in an apartment building

The easiest way is to replace the radiator in relatively new apartments, in which the utilities are installed correctly, and the builders provide for the possibility of draining the liquid from the system without affecting the common riser. In order to replace the radiator in such an apartment, first close the shut-off valves at the battery inlet, thereby stopping the supply of water to individual sections of the heating network, but without stopping the circulation of the liquid as a whole. Your further actions on working with the coolant depend on whether the system design includes outlet valves on the radiators. If there are taps, then you just need to connect a hose to them and drain the liquid into a large container.

WITH single-pipe heating it is necessary to work differently. You will first have to open the bypass valve, which is a backup path for the coolant used to replace the radiator. Only after opening the bypass valve can the shut-off valves on both sides of the battery itself be closed.

After that, you can start disconnecting the radiator from the heating network in the house. When a new battery is installed instead of a broken battery, it is necessary to check the sealing of the connection, check the tightening of the locknuts and only then gradually open the valves at the inlet and outlet of the radiator. At the end, you can open the Mayevsky tap and slowly close the bypass so that the radiator fills up gradually. Slow filling of the system will prevent water hammer, and air from the battery will escape through the Mayevsky valve. The tap can be turned off after water begins to flow through it.

We solve problems with the heating network

Problems with engineering communications happen quite often, however, in order to repair the heat supply, it is not at all necessary to always remove the coolant from the pipes. The most common heating problems include:

air ingress into the system circuit;
pollution;
insufficient diameter of the pipes of the system;
low power of the circulation pump;
absence check valves in complex networks;
making various mistakes during installation work.

Problems in the heating network are often related to each other. For example, the murmur of water in pipes can be caused both by the ingress of air into the pipes, and by poor sealing of the joints, the presence of leaks. For the system to provide an apartment the required amount heat energy and did not cause discomfort to users, it must be constantly checked. Monitor the quality of the connection, bleed air through the Mayevsky taps, and if you cannot find the problem on your own and get rid of it, contact the professionals for help.

Calling specialists in a timely manner when the slightest signs of problems in the heating operation are detected will avoid serious malfunctions, for the elimination of which you will have to spend your money and time, obtain permits to drain water from the riser and coordinate your work with the responsible authorities.

Every year, with the onset of cold weather, the question is relevant for most of us: how to bleed air from a heating radiator? This is primarily due to the formation of air jams, which can provoke constant noise in the radiator and a decrease in the amount of heat at the outlet. The solution to this issue is quite simple. Before solving this problem, thoroughly familiarize yourself with how to bleed air from the radiator without assistance.

Draining fluid from the radiator

Before starting work, it is advisable to understand the cause of the problem, which most often lies in improper operation or the design of the radiator itself.

Accordingly, the order is as follows:

We study the problem and the cause of its occurrence.
We eliminate it, without giving the opportunity to damage the system as a whole.
Checking the result.
We repeat the procedure if necessary.

It is quite easy to understand that the system has excess air. If the heating level of the battery is not the same as we would like, and extraneous sounds are constantly heard in it, then there is an airlock in the system. It corrodes the radiator and prevents the system from functioning properly.

How do air locks appear?

The most common reason is incorrect filling of the system with water, lack of normal pressure in the system, poor water quality or installation error. Be that as it may, the problem exists and needs to be addressed.

Important! In most cases, excess air accumulates on the upper floors. Therefore, initially look for the reason there.

How to remove an air lock in a radiator?

Radiator

And so, how to bleed air from the heating radiator? We use it in a rather familiar way, carried out using a Mayevsky crane installed on most of the batteries. It is a threaded bolt-tightened valve. It is mounted in place of the plug, preferably at the highest point. Allows initially the air that has entered the system to escape, and only then water.

All we need is to prepare a vessel for draining the heated water, the descent of which will be carried out in parallel with the release of air. Open the tap and wait for it to start walking pure water, free of air and gurgling. That's all, we can assume that we have answered the question: how to release air from a heating radiator?

Work order:

We prepare containers for collecting the coolant.
We stock up on a couple of rags that can come in handy in case of unforeseen circumstances.
We open the tap, release the air and drain a couple of buckets of water.

Important! Release the air even after the water starts to run. It is advisable to drain 2-3 buckets of water, so that in the future you do not have to repeat this energy-intensive operation again.

How to remove air from a heating radiator in the absence of a tap?

It so happens that there is no tap, but you still need to bleed the air somehow. In this case, the following sequence of actions is performed:

Unscrew the plug located at the top of the radiator. For more fast execution tasks, it is recommended to use gas or adjustable wrench... Unscrewing is carried out very carefully, with small smooth movements.

Important! If you have a cast-iron battery and the plug won't unscrew, which happens very often, try applying WD - 40. Wait a while and try unscrewing it again.

Unscrewing the plug, drain the coolant until it is homogeneous.
We tighten the cork and check the result.

Important! While screwing the plug into place, wrap sealing tape or tow around the threads. Such an operation will not take much time and will avoid leaks.

How to properly bleed the air from the top point?

Bleeding the radiator

In this case, just as in the above, we need special units installed in the system during its installation. A special unit means a conventional tap, installed at the highest point of the system, used for forced manual drainage of the coolant. In principle, it does not matter at all what kind of crane there will be, ordinary roofing felts, Mayevsky's roofing felts, the main thing is that it should be. You can also make an automatic air release. To do this, you will need to install an automatically air vent, which, when collecting a certain amount of air, will open the valve and release it.

Let's consider the principle of its operation. When air accumulates in the cavity of the air vent, the float located under the valve, which is responsible for its opening and closing, begins to change its position. With the appearance of excess air in the system, the water level decreases, and accordingly, the float drops. Air is released, after which the coolant level is restored and the float returns to the upper position, while closing the valve.

Important! When installing the heating system, be sure to install an automatic air vent. It is compact and reliable. Thanks to him, you will stop thinking about how to bleed air from the radiator, he will do all the work on his own.

Features blew air in the apartment (house)

Bleeding excess air from similar systems does not differ much from the options discussed above. A slight difference lies in the algorithm for performing the work. Initially, air is released from the closest elements, and then from the rest. Performing these operations in a specific order will make it possible to fill the entire system gradually, and not instantly, which naturally has its advantages.

As for the automation, its use is quite convenient and simple, but at the same time it is dangerous. The operating cycles of the valve (opening and closing) will be carried out unattended, and accordingly, if some process is violated, then there is the possibility of flooding the attic or riser at the entrance.

In reality, it is not necessary to bleed air from the radiator and heating system very often. A couple of emissions of air at the beginning of the heating season will be sufficient. If the system is faulty or has some defects, then their number may increase. Respectively, this process can be done manually, which is more reliable. The first operation is when the system starts up, the second is the control one.

Important! If you are the owner of aluminum radiators, then you first need to drain the water, and then start the system. This sequence will significantly increase the life of the radiator.

The procedure for removing air from the system is quite simple. Adhering to the above algorithms and tips, solving the issue of how to release air from the radiator will not bring you much trouble.

Watch a short video on how to bleed air from a battery in a multi-story building.

With the onset of cold weather, you need to take care of starting the heating system. If you live in an ordinary apartment building, the homeowner's plumbers will do everything for you, but if you live in a private house, you will have to start the heat yourself.

Even if the launch is done by professionals, it can be accompanied by a number of problems. If you notice that the radiators are cold , it means, most likely, an air lock has formed in the system. To eliminate such unpleasant consequences, you need to know how to bleed air from the battery.

What is the danger of the gas accumulated in the heating system?

It is very easy to understand that air has accumulated in the system. If you hear strange gurgling and hissing sounds in your radiator, and the heat level is far from what you want, then there is an airlock.

An air lock interferes with the proper functioning of the system, leading to corrosion of the radiator. If measures are not taken in time, there is a risk of damage to the entire heating system.

Where does the airlock come from? Most often this happens due to incorrect filling of the system with water, installation errors, low pressure in a system of poor quality water itself, in which dissolved oxygen is present.

Most often, air accumulates in radiators installed in apartments on last floors at home.

In order to release air from the radiator, it is enough to perform a few simple operations. Let's start with the fact that today all radiators are equipped with special air vents. They are of the following types:

Manual, so-called "Mayevsky cranes". During the operation, a special radiator key or an ordinary screwdriver is used, with the help of which this valve is turned, and the gas leaves the system. Mayevsky's tap is located at the end of the radiator.
Automatic . They work without human help when necessary. When air appears in the system, the float inside opens a special valve, which releases the accumulated gas. Such devices are installed where there is a high probability of its accumulation.

Removing air from the radiator

We will tell you in more detail how to bleed air from a heating battery.

Find Mayevsky's faucet on the radiator. It is a small recessed valve that can be turned.
Prepare a container for the liquid that will drain from the radiator, put a rag on the floor.
Turn Mayevsky's crane with a wrench or a screwdriver (depending on the design of the crane). First, drops must go out mixed with air. When the normal flow of water begins to drain from the hole, you can close the tap. Gas was released from the system.
Purge air from all batteries in your home by following these instructions.

Most often, the problem of air formation in the system is familiar to the owners of aluminum radiators. To avoid further problems, it is necessary to immediately take care of the event at the start of the launch, otherwise the batteries will not last long.

Removing air from the system is a fairly simple procedure that is very easy to handle. If you follow these tips, the problem will be resolved.

Video

We invite you to see what we talked about.

Content

Air locks in piping and heating radiators disrupt normal work systems and reduce its thermal efficiency. Removing air from the heating system helps to correct the situation. Emergency measures will have to be resorted to much less often if you correctly design and mount an autonomous system, providing for the installation of air vents in all problem areas.

Heating system preparation

Reasons for the formation of air congestion

Complete heating system closed type airtight, but this does not guarantee the absence of air bubbles. Where does the gas in pipes and radiators come from?

Air in the heating system appears for the following reasons:

The heat carrier is tap water, which has not undergone special training - when heated, the air dissolved in water begins to stand out, and plugs form from small bubbles.
The tightness of the system is broken, and air is gradually sucked in through loose connections.
During renovation works part of the circuit was disconnected by shut-off valves, some elements were replaced or cleaned, and then the coolant was again fed into the repaired circuit.
The pipeline was laid with violations of the standards - a small angle of inclination of pipes and improper installation of bend points prevents gas bubbles from entering special devices - air vents. As a result, gas accumulates in problem areas and interferes with the normal circulation of the coolant.
If the heating system of a private house fills up very quickly (or when the coolant is supplied not at the lowest point), the liquid is not able to completely displace the air from the complex configurations of pipelines and radiators.
Air vents missing or incorrectly located. Also, the reason for the incorrect operation of the device for bleeding air is its contamination with mechanical impurities in the unfiltered coolant.

Mayevsky's manual tap on the radiator

Separately, it is worth considering gas formation in aluminum radiators... When the metal comes into contact with a weakly alkaline coolant, hydrogen is released, which accumulates at the highest point of the heater. If the radiator is not equipped with an air vent, over time the gas lock will prevent the coolant from freely passing through the internal channels of the heater.

Signs and consequences of airy system

If the boiler unit is working properly, the supply temperature is correct, and the battery cannot cope with heating the room, check the presence of air in the heating system. Air locks in radiators are a frequent occurrence, their presence is indicated by uneven heating of the device when the upper part remains cold. The airiness of the battery at first slightly reduces its heat transfer, but if the problem is not solved in time, the accumulated gas will block the path of the coolant and the room will not receive full heating.

Air bubbles interfere with the free movement of the coolant due to the narrowing of the channel, and this provokes the appearance of specific sound effects. Signs of plugging include noise in pipes, bubbling, and seething. In difficult cases, pipe vibration is also added.

Airing the heating system

Small air bubbles, which have not yet formed a plug, but are already actively released from the coolant, turn it into a water-air mixture. She is dangerous for circulation pump not adapted to pump gas. Plain bearings are installed on the shaft of the pump unit, which must be located in a liquid medium. A high air content in the coolant leads to premature wear of the elements due to the effect of dry friction.

If you do not bleed air from the heating system, its excess in the coolant can lead to a stop or breakdown of the circulation pump. This is dangerous for solid fuel boilers that are not equipped with automation: when the circulation stops, the cooled coolant will no longer flow into the boiler's water jacket. Overheating and boiling of liquid in confined space threatens with an explosion if the security group does not work.

Knowing how to remove air from your heating system can help you deal with air lenses in radiators made from materials that tend to corrode and foule. The air contains carbon dioxide and oxygen, and they contribute to the breakdown of calcium and magnesium salts, which are dissolved in water. The reaction proceeds with the release of carbon dioxide. Under the influence of high temperatures, hydrocarbonate compounds form a layer limescale, and carbon dioxide promotes corrosion metal surfaces... As a result, the battery breaks down faster.

Accumulated dirt in the heating system contributes to the failure of the radiator

In order to exclude unpleasant consequences After starting the heating system of the house after the summer break, you should check it for air jams. If it is airy, take prompt action to correct the problem.

Heating system without air pockets

To prevent air from accumulating in problem areas in an individual heating system, but to go outside, it is necessary:

correctly design and install the pipeline, correctly install the radiators;
use automatic and manual air vents.

Consider how to expel air from the heating system with natural circulation and top wiring... When arranging the pipeline, it is important to observe such an angle of inclination at which air bubbles freely move upward to the highest point of the contour, without accumulating at bends and gentle sections. At the highest point of such a system should be installed expansion tank open type through which air bubbles enter the atmosphere.

Bleeding air from the heating system using an automatic air vent

A different principle is used to bleed air from a forced movement system or a gravity system with a bottom wiring. Return pipelines are installed under a slope (this simplifies the drainage of fluid from the system), and automatic valves are installed at the top point of all individual circuits, through which air is discharged as it accumulates.

In addition to automatic air vents, the system also uses Mayevsky's manual taps. Such air vents are mounted on heating radiators - on the upper branch pipe on the opposite side of the pipe supplying the heated coolant. In order for air to enter the valve and not accumulate in the upper radiator manifold, it is recommended to install the heating device at a slight angle. Air venting is done manually as needed.

How to find an airlock?

Ideally, the system is able to cope with airing on its own thanks to automatic valves through which air is released. Having found that a separate heating device or part of the circuit does not work properly, it is necessary to find a place where an accumulation of air has formed.

Touch the radiator - if its upper part is colder than the lower one, it means that the coolant does not enter there... To release the air, open the Mayevsky valve mounted on a steel, aluminum or bimetallic radiator, or a valve valve, which is mounted on cast iron batteries.

How to identify an airlock in a battery

You can also determine the place of airing by sound - under normal conditions, the coolant moves almost silently, extraneous gurgling and overflow sounds occur due to an obstacle in the flow.

Metal pipes and heating devices are tapped with light blows - in places where air accumulates, the sound is noticeably louder.

Getting rid of the airlock

If there are manual air vents on the radiators, there are no problems with how to remove air from the batteries. Using a screwdriver or a standard key, the stem of the Mayevsky valve is slightly unscrewed, while a suitable container is placed under the drain hole (a half-liter glass jar is enough). Bleeding air from the heating system using a manual air vent is accompanied by hissing and whistling, then splashes appear, after which the coolant begins to flow in a thin stream. At this stage, the Mayevsky valve should be closed.

Note! If the battery continues to warm up poorly after air bleeding, the problem may lie in a blockage. In this case, the heating device is dismantled and washed. After reinstalling the radiator, check the system for air pockets.

To remove an air lock from the heating system, if it has accumulated to the side of the air vent (manual or automatic), proceed as follows:

Open the air valve or valve closest to the air bubble.
They begin to gradually feed the system with a coolant so that the liquid, by increasing the volume, displaces the air bubble towards the open air vent.

Automatic air vent valve with angle connection

What to do in difficult cases when the plug is not removed by adding the volume of the coolant? In such a situation, in addition to increasing the amount of coolant, it is required to add pressure, heating the liquid to critical temperatures. You should be extremely careful not to be scalded by splashes that accompany the air release through the automatic valve.

Important! If a plug systematically forms in the same section of the pipeline, cut a tee in this place and install an automatic valve.

Conclusion

By purchasing heating equipment, pay attention to the quality and reliability of automatic air vents - they must function properly so that it was necessary to take on the elimination of air locks only after draining and filling the circuit with a coolant. If you know how to bleed air from the heating system, the procedure will not cause much trouble.