[Per]

Jon, I thought Hish had found a 12 volt pump capable of delivering adequate pressure and flow to flush a Headhunter toilet without an additional accumulator tank. Due to limited space, that would be great.

On a related note, our toilet would not flush this weekend despite 60 PSI and a properly cycling pump. There was only a small movement of water in the bowl both with pressing the button or operating the manual trigger on the flush valve. I checked the diaphragm in the flush valve and the vent hole was clear and no damage or debris seen. The bus is back a Jeffs for a fix.

[Michael]

Assuming the pump filter is clear and not restricting water flow it sounds like the flush valve is not opening fully as a possibility.

My back up pump only delivers 1.3 GPM and has a 60 PSI limit, but with the accumulator is is more than adequate so as you can see it needs both pressure and a deliverable volume of water.