Why does the pressure drop in a gas boiler?

Most often, users of even the highest quality devices are faced with a problem in their performance and do not know what is causing it. The most common is a significant decrease in pressure. However, this occurs exclusively in systems that have forced circulation. If natural, another defect may occur. In this article we will analyze the main points of the first of the presented situations, which every owner of a gas boiler should know.

What should be the normal water pressure in a gas boiler?

Of course, it is necessary to monitor the optimal parameters at which the work process is as efficient as possible. When assembling the structure, manufacturers build in a special device that allows it to perform performance monitoring functions. The information that it collects can be seen on the panel and, based on this, analyzed. So the ideal measurement is considered to be one and a half to two atmospheres.If this shows a number greater or less than the specified interval, then this indicates a problem.

In addition, it is worth remembering that there are several types of pressure:

• Static. With it, the heating system indicators are at rest.
• Dynamic. Passes through all structural elements.
• Maximum. The device may stop working if the level is much higher.

It is also common for pressure to change readings from lower to higher as the unit warms up.

Why pressure in a gas boiler may drop: common reasons

In order to always be prepared, even in sudden and unpleasant situations, you must know all the possible sources from which various difficulties can arise. Let's look at the main ones, the most common.

The boiler releases excess air

The reason for this may be the fact that you have not used the device before. Naturally, when first started, the device will eject excess air mass. This independent action can be explained by the presence of automatic air vents. If you have a purchase with a wall clamp, you can turn the screw specifically designed for ejection. Then air will flow, followed by water. This is necessary for further functioning.

There is air escaping from the expansion tank

Air leakage may occur for the following reasons:

• The compensator is broken; therefore, it will not maintain the specified pressure.
• Loss of tank seal. Because of this, the atmosphere is thrown out of it. Subsequently, you can notice a lightning-fast decrease in pressure.
• Do not forget about cases that arise due to long-term operation - a breakthrough of the membrane located inside the tank. It is very difficult to break through, however, the probability of something happening exists, so it is easily recognized.
• The next reason could be the spool. It is located on the top of the device and gradually bleeds air. This process can take several months. As a result, an unfavorable outcome is possible - the elimination of the entire air mass and the filling of the entire expansion unit with coolants.

The heating system is leaking

Perhaps the most unpleasant situation is a leak, because the water begins to splash immediately or appear gradually. In any case, sooner or later it will become noticeable to others. This occurs due to damage in the upper or lower part of the water-heated floor. Correcting what happened is a long and expensive process. However, nothing is impossible.

Why else can the pressure drop in a double-circuit heating boiler?

Not only the above mentioned points deserve attention. There are other problems:

• If the service life exceeds a sufficient temporary amount, then most likely the boiler automation is only out of order. Because of this, microscopic cracks are possible, which are sometimes difficult to notice with the naked eye.
• When crossing pipelines, the device used may leak.
• The boiler is not suitable for use due to incorrect selection.
• Poor quality installation of the entire heating system.

Why does the pressure in the boiler drop if there are no leaks?

Of course, in addition to the main problems, there are also indirect ones. For example:

• Formation of so-called air jams.They can be detected due to improper operation of the air release valve - it becomes clogged or the regulation is incorrect.
• Also, due to violation of technical requirements, when coolant systems are filled, low pressure formations are possible.
• Poor sealing also allows air to enter the system.
• Atmospheric suction when connections are found to be loose.

All of these sources are accompanied by characteristic noises and sounds. Therefore, they can be identified quite easily and we can begin to eliminate them. Otherwise, new problems will arise that will be much more difficult to deal with. In addition, not only discomfort may arise for the residents of the structure, but also danger to surrounding people.

How to increase the pressure in the boiler depending on the cause of the violation

Here are some troubleshooting tips

1. The most common is leakage. In this case, it is recommended to examine the entire structure as thoroughly as possible and find the place of its origin. If detected, the next step is to cut off the unit from the system. If the pipe is damaged, then you need to replace it: remove the old one and install a new one in its place. It is advisable to carry out the same fraud if the flywheel is damaged. If corrosion occurs at a pipe connection, the area can be sealed.
2. It is always recommended to reproduce preventive measures in advance. This will ensure protection against air locks. Pay attention to the correct connection of the heating structure, as well as all possible valves and components. Always check correct operation before starting work.The test proceeds as follows: apply pressure using the compressor and observe the parameters. If it doesn't weaken within 30 minutes, everything is great.

It is strictly forbidden to carry out repairs on all equipment yourself. It is necessary to call a special service, whose qualified technicians can quickly eliminate all defects and set up the device for further high-quality operation. However, there are situations where urgent repair of the device is required. Then even people who do not have certain knowledge and skills must begin to partially or completely eliminate the breakdown. And of course, the first thing you should do is find out which group of reasons yours belongs to.