A pool sump is a crucial component of the plumbing system of in-ground pools, and they’re vital in areas that receive lots of rain or areas where the water table is high.
A sump system runs from the bottom of the swimming pool at its deepest point to a compartment located on or around the pool deck.
The sump system is a long tube that allows excess water from the pool to flow into a chamber where it can be removed with a sump pump.
If the groundwater level can exceed the height of the pool, the extra pressure could crack or warp the swimming pool and even cause it to lift from the ground.