I had a leak around my main drain. When I drained the pool to paint it there was an obvious deterioration of gunite and concrete around main drain and water was seeping out. Pool company told me they pressure tested my main drain line and it was fine. They plugged the deteriorated concrete and I painted my pool. They came back a few days later and plugged my main drain then epoxy-ed a new drain cover to bottom of pool. They werent supposed to plug my main drain because guy told me it was fine, but they already started to fill my pool up. I asked guy why he did that and he insisted he told me my line was bad and demands his $300 payment. My question is if I lower the water in the pool several feet below the skimmer should the water in the main drain stay if their isn't a leak? If there is a leak won't it level out with the pool water line? Any help greatly appreciated. Just trying to prove he told me line was ok with out emptying whole pool and ripping epoxy-ed drain off.