Dometic 385311581 2" Duckbill Valve Kit. Pack of 4 black 2" duckbill valve kit for Dometic toilets. These duckbill valves are designed for use with the VG4 J-Series Vacuum Generator and M-Pump or large in-line check valves (308300011).
When troubleshooting a vacuflush system, it is recommended to begin with a new set of duckbill valves. If the vacuum pump is no longer shutting off, it's an indication to replace the duckbills. All VG4 Vacuum Generators and M-Pumps include four valves. When the pump body is removed from the tank, some customers opt to replace the pump-to-tank O-ring for comprehensive maintenance.
- 4-2″ Duckbill valves
- For use with All VG4 J series Vacuum Pumps
- Can be sued in 2″ inline check valves