Recent content by awalts

It turned out to be the Water Pressure Reducing Valve. I lowered the household water pressure (loosened the valve) and then slowly brought it back to the original pressure. And the knocking went away. I can't explain why it worked, but it did. We haven't heard the knocking sound in over a year.

I have an update to add to this knocking issue ... I bought a pressure meter and attached it one of the outdoor spigots. Normally the water pressure is about 70 psi and the needle does not move. However, when the knocking sound occurs, the needle shakes/fluctuates between 60 and 70 psi. So long...

I turned off the water to each toilet (and then all of them at the same time), and the knocking still persists. The two valves (one shut off, one not) go to the outside spigots (front and back). The knocking sound occurs regardless of their on/off setting. Lastly, another video of the...

Nope, I have a normal gas heating system, not a hydronic one. The pipes are just cold water lines coming off the main and heading to the outside spigots. The tags were put on by the house inspector just marking what each valve does (front, back, water heater etc). I'll turn off the toilet (s)...

I wish it were as a simple as a woodpecker. But the knocking is as likely to occur at 10pm as 10am. I have had the water off to the house for periods of 8 hours and not heard the knocking. When I do hear the knocking, the water to the house is on, nothing is running or leaking so far as I...

paul52446m, there is a PRV where the cold water enters the house. If this is the source of the knocking, how do I prove it and how do I replace it? redwood, if it is a leaky toilet, then I should be able to isolate the problem by sequentially turning the water off at different toilets. I've...

paul52446m, there is a PRV valve where the cold water comes into the house. Can this be the cause of the noise? If so, how do I prove it and can I easily replace the valve? Redwood, If it were a toilet, I should be able to sequentially turn off the water to all of the the toilets and...

As shown in the videos, the noise is a rapid, loud, rhythmic beating that can change in tempo, duration (usually 30 seconds or less), and volume. The noise always comes from the same location in the house - it seems to be in the interstitial space between the basement and first floor...