I noticed a small pool of water/moisture on the concrete floor exactly in between the pump and the sand filter. I can find no water on sides of pump, filter or any of the pipe joints. Pool water level does not seem to be decreasing anymore than I would expect with evaporation. I started clearing away debris on the floor and found a PVC pipe cut off at floor level and extending downward into the concrete. The pipe is full of water up to the water on the floor. I could assume it is a clogged drain pipe, but want to run this by someone who knows before I go jabbing a broom handle down there.
Does anyone know what this pipe is and what purpose it serves? Could the water problem be coming from this pipe? Obviously I was not the homeowner when the pool was put in and would appreciate any help with this.