Pool Pump Mechanical Shaft Seal Replacement This PS-200 pool pump shaft seal is designed to replace AS-200 and 354545 mechanical shaft seals, providing reliable sealing performance for swimming pool and spa pump systems. The 5/8 inch shaft seal helps create a secure barrier between the pump motor and impeller, preventing water leakage and protecting the pump motor. Constructed with durable sealing materials, this mechanical shaft seal resists water, heat and long operating hours. Compatible with Aqua Flo XP, XP2, XP2e, FMCP, FMHP, TMCP and CMHP pump models. Available in 1 piece and 2 piece options to support different pool pump maintenance needs.