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Noise emanating from water and heating systems is a very unpleasant problem, as these systems operate continuously, which can significantly affect not only the quality of sleep but also the overall time spent at home. Sounds travel through the liquid, pipes, and walls, and are therefore often heard even in more distant parts of the house.
Moreover, noise can also indicate various technical problems or malfunctions in the water or heating systems, so you should pay attention to this issue and its resolution. Some of the possible causes of noise can lead to irreversible damage to the system and its individual components.
Various unwanted sounds can originate from the pipes, but also from electronic devices, for example from the circulation pump. Even though manufacturers promise noiseless pumps, you may encounter unpleasant and disturbing sounds in various situations.
Therefore, look for the problem in both the pump and the water distribution. Often, it is not easy to determine whether the source of the noise is the pump or the pipes themselves. The pump affects the flow of water in the pipes, and at the same time, sounds from the pump spread into the distribution system.
Water and heating distribution systems are very complex systems that are subject to complicated hydraulic laws. Therefore, the source of noise can often only be identified by a qualified and experienced expert.
Before calling plumbers or heating engineers, you can try to identify the cause yourself. The most common problems are also easily solvable on your own.
In the case of air in the distribution system, you may hear an unpleasant humming or even whistling. Bleed the system using bleed valves.
Improper pump settings lead to rapid water flow in the pipes, causing significant noise. Try to reduce the pump's power setting and see if the noise decreases.
Cavitation occurs in pipes during unstable conditions, such as when closing valves. Changes in water flow and the associated vacuum cause the formation of cavities or vacuum bubbles, which vibrate and collide with the pipes. These phenomena can be perceived as unpleasant humming and whistling sounds. Cavities also accelerate pipe corrosion. How to prevent cavitation? Increase the pressure in the tank, reduce the liquid temperature, and the pump speed.
Sometimes the problem lies in the distribution project itself, which may be undersized, oversized, or the pipes do not have sufficient slope. In such cases, unfortunately, the solution is not simple. If you do not want to redo the entire distribution, a temporary solution may be acoustic insulation.
Before putting the heating system into operation, it should be properly balanced by a heating engineer using a circulation pump. One of the symptoms of an unbalanced system is noise and whistling. In the case of smaller units, you can manage it yourself, thanks to a circulation pump with an automatic balancing function.
Sometimes even a quality pump can cause trouble, especially if it is poorly selected, incorrectly installed, or inadequately maintained. Unwanted sounds can be emitted by both the circulation pump and the boiler pump.
If the noise problem occurred after replacing the pump, it can be assumed that the cause of the noise is its incorrect installation or an unsuitable pump model. If a company replaced the pump for you, file a complaint. However, if you selected and installed the pump yourself, you will need to look for a suitable type of pump.
Not only the pipes but also the pump can be air-locked. Bleed the pump by setting it to the highest speed for 30 minutes, or install a bleed valve. Some pumps bleed automatically.
As mentioned above, too high a liquid speed in the pipes causes noise. However, in the case of low flow, the pump operation is noisy. Therefore, it is ideal to install a pump with a control unit that optimizes the flow so that both the pump and the distribution are noiseless.
Impurities introduced into the pump cause the most noise. This problem is common in older systems. You can prevent it by installing filters that capture impurities in the pipes.
However, you must also regularly clean these filters, as they will not capture more impurities if they are full. If impurities have already entered the pump, you will need to clean the pump, especially the impeller, or replace the pump with a new one.
Modern electronic circulation pump.
Even in the case of noise in the water and heating system, the best solution is proper prevention against these unwanted phenomena. Therefore, pay attention to the proper installation of the distribution, its balancing, and regular bleeding. The distribution project should be prepared by a qualified designer. Leave the installation of the pipes to a professional company, do not attempt it yourself. There are many possible mistakes that a layperson could make.
Use modern electronic circulation pumps, preferably with a control unit that can automatically optimize the pump's operation, thus avoiding low or too high flow. Such pumps often also have an automatic bleeding function. Never install a pump that has different dimensions or parameters than the original pump – in the case of a new building or new distribution, the necessary pump parameters will be determined by the designer. Install filters on the pipes to capture impurities, and regularly clean these filters.
If you follow these essential steps, noise from the distribution should not bother you. Healthy and well-functioning distribution is important not only for your comfort but also for the longer lifespan and low failure rate of the system and related electronic devices.
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