When I close my return pump the check valve stammers. What does this mean?
youtube.com
No, this never used to happen. I have 2 return pumps, before only one did it, but stopped after 15 seconds. Now both started doing it, but the 2nd return pump stopped, while the initial one is still doing it.
April 24, 2023
youtube.com
No, this never used to happen. I have 2 return pumps, before only one did it, but stopped after 15 seconds. Now both started doing it, but the 2nd return pump stopped, while the initial one is still doing it.
