Dometic/Sealand | Duckbill Valve 1-1/2" Black (2 Pack) | 385310076 KOHLER 10EKD VST ASSEMBLY (NOS) OMC 433509

(NOS) OMC 433509

50FAPLJVN 1993

574BPERGD 1991

MPI BRAVO (GEN VI) GM 502 V-8 - 0L085433 THRU 0M024999

They have a high melting point

Dometic/Sealand | Duckbill Valve 1-1/2" Black (2 Pack) | 385310076 KOHLER 10EKD VST ASSEMBLY (NOS) OMC 433509The Dometic Sealand Duck Bill Valves Kit comes with two 1 duck bill valves for T and S series pumps. These valves are a critical component of the VacuFlush system. They help maintain and generate the vacuum for the system and should be replaced frequently. Note that S series vacuum pumps, low profile vacuum pumps, and the VG2 vacuum pumps require 4 valves (2 kits). The T series discharge pump requires 1 kit (2 valves).