I have been having an extremely annoying problem for the past several months. Right where the 3/4 copper comes into my house it goes through a Watts pressure reduction valve.
Here is a video
Whenever there is NO water running (all sinks / toilets etc off) the pipes start this rhythmic knocking that resonates throughout the house. It is not a hammering because it only occurs when all the water is off.
As soon as I turn the main water valve off, OR as soon as i open any sink (hot or cold) the knocking stops, and then starts up immediately again when water is turned off.
There is no pattern to this. It occurs variously throughout the day. Sometimes it knocks for an hour and sometimes for less than a minute.
I already replaced the pressure reducing valve with a new one, which one plumber suggested.
Is it possibly the water meter? I assume that would only make noise when water was actually flowing.
It seems sort of like air in the system or something. I did have a new water heater put in last year and they removed my previous expansion tank, telling me it is no longer needed because we have an "open loop" system and therefore the previous owner must have overpaid since it is only needed on "closed" systems.
Thanks
Here is a video
Whenever there is NO water running (all sinks / toilets etc off) the pipes start this rhythmic knocking that resonates throughout the house. It is not a hammering because it only occurs when all the water is off.
As soon as I turn the main water valve off, OR as soon as i open any sink (hot or cold) the knocking stops, and then starts up immediately again when water is turned off.
There is no pattern to this. It occurs variously throughout the day. Sometimes it knocks for an hour and sometimes for less than a minute.
I already replaced the pressure reducing valve with a new one, which one plumber suggested.
Is it possibly the water meter? I assume that would only make noise when water was actually flowing.
It seems sort of like air in the system or something. I did have a new water heater put in last year and they removed my previous expansion tank, telling me it is no longer needed because we have an "open loop" system and therefore the previous owner must have overpaid since it is only needed on "closed" systems.
Thanks