Boatingbill
Veteran Member
I have 2 heads. The system is 1 pump split to 2 tanks. The aft head works fine. The forward has no vacuum at all, as well as foul odor from the holding tank when pump is on. I have removed the toilet itself. Tightened all the hose fittings. As I mentioned the side that runs the aft works fine, so I know the pump is building vacuum. My next guess is the valve. Can anyone tell me how to check it?