Bertie_Woo t1_irniy26 wrote on October 9, 2022 at 4:49 PM

Reply to comment by smugbox in Your annual reminder that if your apartment has a radiator, don't open and close the valve. This can create condensation in the system causing a knocking sound. Radiators are designed to be used with a series of open windows to balance heat. by emeyer94

If the service valve is in good condition it might not be a problem, but using an air release plug / smaller orifice is a more reliable permanent solution if you have issues with water noise.