Hmm, that's a good thought. Thanks aharon.

I'm in Michigan and we have a walk-out basement, so the pump and filter are in the basement. There's a pipe that runs from the pool under the basement floor to the laundry room. Where it comes up through the floor it's a semi-rigid pipe that is hose-clamped onto the PVC pipe that goes into the pump. The PVC joint that joins the flexible pipe to the pipe going into the pump is PVC cemented. So I suppose there could be a leak in there, but there's never any water that gets out through it. I'm not sure how to find it without just taking it all apart and replacing. Or if it's even worth thinking about.