water hammer

Jorge

I have two zone valves one for first floor baseboard and one for 2ed floor baseboard. when a zone turns off I can here a bump soud coming from the baceboard. Boath zones can be on or only one zone on same sound when valves turn off.

Jorge

Water hammer

I have a water hammer noise in my baseboard heat every time the zone valve turns off. They are honeywell zone valves and they are mounted on the feed side of the boiler. Boiler temp is 180 and psi is 20.

frank_25

Bada-Boom ina pipes

You mentioned only one zone valve, what about the other zones? How many zones in total and what are they for? Pics?

TK03

Pipe Banging

Normally this can be resolved by removing one of the return springs on each valve. The problem normally happens when two zones are calling and one satisfies and closes. The valve closes too fast and creates this banging noise. By removing one return spring on each valve it will close slower and not try to bounce back open while closing.

Jorge

Thank You Ron I just tried it and it worked