Prevent backflow and ensure a smooth-running sanitation system. Our duckbill valves are one-way check valves that keep the waste and water running in the right direction. These high-quality parts, made by Dometic, should be replaced every 2 to 3 years or sooner depending on the frequency of use.
oFour valves are required for the S-Series pump (vacuum), while two valves are required for the T-series pump (discharge). Our duckbill check values also fit the following vacuum generators: VG12/24, VGIII lp.