San-T-Flush check valves
Can anyone tell me where the check valves are located for the San-T-Flush systems, specifically on a Voltage 3600? I've read several instances where they were installed backwards from the factory. I have checked under the kitchen sink, under the 2nd bathroom sink, and have removed the inlets from the wall of the camper, but have not found anything yet.
The problem I'm having sounds like the check valves could be installed backwards. When flushing the hose feels hard, and using a flow meter I have measured about 1 gallon per minute flow rate. Both inlets appear to let in very little water. I have tried with the dump valves both opened and closed, but it makes no difference in flow rate.
2013 Voltage Epic 3600
2006 GMC Sierra 2500HD Diesel (LBZ)