Learn what is the cause of this and how to repair it. . Pool Pump leak out of the bottom and fix. True Light . If you see water leaking out of the bottom of the pool pump assembly, it's a good indication that you may . If you see water leaking out of the bottom of the pool pump assembly, it's a good indication that you may have to replace the shaft seal within the motor pump assembly. As shown in the pool pump cut away, the shaft seal is located in the motor pump assembly behind the impeller. A pump system is made of a motor and the piping. The suction side which pumps in the water is underneath. If there is a leak on the suction side through which . Seal plate gasket failure - every pump has some sort of a gasket that seals the two halves of the pump where they bolt or clamp together. Over time these gaskets get old and hard and begin to leak. This usually results in water leaking off of the bottom of the seal plate. Mar 30, 2016 - New gasket set and everything went in and the thing is still leaking. . I've spent more energy trying to repair the pool setup than actually swimming . The bottom portion is thinner than the top portion which leads me to believe . Mar 10, 2013 - Does anyone know how to fix my pool pump leak? A few months ago my brother was working on it, and caused it to run dry for a few minutes . Aug 19, 2015 - Water around the pump could also be leaking from the PVC plumbing fitting on top of the pump, which runs down and drips off of the bottom of . In most cases, a leak underneath a pool pump is caused by a pressure-side leak. This is easily combated by inspecting the impeller housing o-ring, shaft seal . Leaking pumps can destroy the swimming pool motor. Here is some advice on how to replace a pool pump seal. The following instructions are general. Seal .