Xylem-Bell & Gossett P5001035 Lip Seal Inboard Only is a replacement sealing component designed to prevent fluid leakage around rotating shafts in compatible hydronic HVAC equipment. It works by creating a tight barrier between the rotating shaft and stationary housing, helping retain circulating water and maintain proper pump operation. Designed for use with compatible Bell & Gosset... https://www.partshnc.com/p5001035-xylem-bell-gossett-lip-seal-inboard-only