Vacuum Flush System Seals & Service
Stop the
Phantom Cycling.
VacuFlush systems are powerful but sensitive. If your pump runs intermittently, you have a leak. We replace the critical seals to restore vacuum pressure and silence the pump.
The "Night Cycling"
The most common complaint: the vacuum pump turns on for 30 seconds every 15 minutes. This kills batteries and ruins sleep. It means the system is losing vacuum pressure somewhere.
Duckbill Valves
Inside the pump are four rubber "duckbill" valves. Over time, they stiffen and stay open, preventing a vacuum seal. They are the #1 cause of failure and must be replaced every 3 years.
Bowl Seal Failure
Does water drain out of the toilet bowl even when you haven't flushed? If the bowl goes dry, air enters the system, causing the pump to run continuously. We replace the seal and ball gaskets.
Diagnostic Protocol.
Finding the leak in a pressurized system.
Isolate
We use vacuum gauges to test the system in sections. Is the leak at the toilet bowl? Or is it downstream at the vacuum generator pump?
Replace Valves
We disassemble the Vacuum Generator (VG) pump, clean the chamber, and install four new Dometic duckbill valves.
Reseal Bowl
We remove the toilet base cover, clean the ball valve, and install a new Teflon and rubber seal kit to ensure the bowl holds water.
Vacuum Test
We run the system and verify it builds vacuum quickly (under 60 seconds) and holds it indefinitely without cycling.
Sealed Tight.
Reliable flushing for extended trips.
Dometic / Sealand.
We service the entire VacuFlush line.
Common Questions
Why is it cycling?
The vacuum switch detects low pressure and turns the pump on. If the pump runs, vacuum is escaping either through old duckbill valves or a dry toilet bowl.
Can I use a plunger?
**Never.** Using a plunger on a VacuFlush system will destroy the duckbill valves and possibly damage the vacuum bellows. It requires specialized disassembly to clear clogs.