How "watertight" and "airtight" are properly installed PVC ball valves?
I have what I think is a suction-side leak on my fountain circuit. Since we have owned the house, the pump would never self-prime (maybe that's to be expected as the pump sits 6-8 feet above the water level), but now it seems the basket empties of water after just a few hours of downtime.
One way I can narrow down the problem would be to close the ball valve (for a few days, I'd guess) that's on the return side and see if the water falls, but I need to know whether this makes sense as a test. If I close the valve, should any air be able to get in the line?
Thanks.
I have what I think is a suction-side leak on my fountain circuit. Since we have owned the house, the pump would never self-prime (maybe that's to be expected as the pump sits 6-8 feet above the water level), but now it seems the basket empties of water after just a few hours of downtime.
One way I can narrow down the problem would be to close the ball valve (for a few days, I'd guess) that's on the return side and see if the water falls, but I need to know whether this makes sense as a test. If I close the valve, should any air be able to get in the line?
Thanks.