So I had a heck of a season last year, going through 3 motors, and a ton of headaches. I think I just narrowed down the sources of the problems: bad electrical (house panel wasn't tripping breaker like it should have) and a suction side leak in the skimmer line. Based on a thread I posted from last year (HERE), I should have gone ahead with a pressure test, but a few different pool techs who came out all pointed to the electrical as being the culprit. I'm not so sure anymore, but the non-tripping breakers didn't help save the motors from going up in smoke...
So this is where I'm at:
I filled up all three (capped) lines to the pool, and the shallow end return and deep end vac line pipes are holding steady with the water in them. The line for the skimmer... I've had to fill back up a few times, and it took significantly more water than the other pipes to fill up (and there should have been a good bit of RV anti-freeze in this one.) I filled it up repeatedly such that it started to hold its water fairly well, but checked it an hour later and it had dropped down a good bit again. I was told this was a reliable test, with these pipes capped at the other end, that the water level should hold unless there is a leak.
The question is, should I dig up and repair the leak (I'm told it's leaked here several times before) or ditch this line (1.5" flex PVC) and run new 2" pipe to the equipment? If I do this, should I also do the deep end vac line as well? Could I leave the 1.5" flex return line?