Have had no issue with pool until yesterday and I am stumped..... I believe I have a leak between the skimmer and the pump. (Checked unions of PVC, skimmer gasket, skimmer top, and draing plygs)
There is just one underground(under concrete) line but the funny this is I only lose water while the pump is off. Also the system is sucking air somewhere and i cant find any where in the above ground plumbing, There are no drips or leaks or any thing of that nature.
Also, When i try to vacuum, within a couple of feet it the suction cleaner stops and The pump immediately fills with air losing the prime (Happens every time on either filter and waste).
The odd thing though is if I turn the valve from the skimmer to the pump to 3/4" open the pump primes. But as soon as i connect the suction cleaner it loses prime again.
My pool is very old so the main drain at the bottom was closed off 10+ years ago so it only has the skimmer with a line to the pump and one return line...
Any help would be appreciate. Also if i do have a leak under the concrete is there any test to be sure or as there any fix without digging up the concrete?