Causes of noise from working heating radiators

Hello!

Recently we replaced heating radiators in the apartment and five days ago we were connected to hot water. From time to time, the batteries make a sound, as if passing air somewhere, but the batteries are dry to the touch. The sound is fickle. They blew air, everything is normal. What could it be? Wait for the flood soon?

Natalya

Expert Answer

Good day, Natalia.

Noise from operating heating radiators appears for several reasons. The murmur and periodic tapping usually occur due to uneven pressure. The highway consists of sections of various sections, therefore, at high pressure, the coolant can increase its speed in the narrowed sections - this causes unusual sounds. Perhaps when replacing the radiators, fittings with a reduced cross-section were installed, or specialists found it unnecessary to install a bypass. Very often, this occurs when soldering polypropylene with a violation of the thermal regime, because of which, at the joints of the fittings, the internal section of the pipes is more than halved.

Humming and whistling (similar to the case you described) very often appears due to the saturation of the coolant with gas bubbles. Because of them, air pockets appear inside the radiators, which, when flowing from one chamber to another, create a sound effect similar to the noise during a leak. The fact that you once blew air does not mean at all that this problem is gone once and for all. Airs elements of a central heating system depends not only on the health of the heating appliances in your apartment - many factors affect this. To get rid of this phenomenon once and for all, install automatic air vents in places of probable gas accumulation. Most likely, after this, the problem of unpleasant noise will disappear once and for all.