The Grundfos 99886916 EPDM Gasket 1-1/4" and 1-1/2" 2-Pack is a replacement sealing component designed for compatible Grundfos pumps and hydronic HVAC systems. Manufactured from EPDM rubber, these gaskets create a secure, leak-resistant seal between connected pump fittings and piping surfaces. They help prevent water leakage while maintaining proper pressure within heating and circula... https://www.partshnc.com/99886916-grundfos-epdm-gasket-1-14-1-12-2pk