Looking for the pump. Took floor panels up and found holding tank, but no pump, took bottom cover of toilet and nothing.....where is the pump that builds the vacume? It comes on builds pressure, and it flushed once, but never comes back on... Thing it's the vacume switch not telling it to come back ok. But can not find the pump.

The water has to be on the on position too or it wont work. Pump is in the tank on my boat. I replaced it 2 years ago.

I have the water turned on as well. It works, the vacum just stop and it not in the tank there was no electrical at all at the tank

Do you have the "Toilet" turned on at the panel?

Toilet & Water need to be on - as well as the main!

Yes..... Did you read my post? It comes on once, and build vacum but then stopes


Main, labratory, and water all on

Thats what its supposed to do. It builds up pressure so its ready to go. You step on the pedal SWOOSH - it sucks it all down and builds up line suction for the next turd. It doesnt continuously run.

I know how vacufluch works man. Ha

It builds vacum, I flush, and that's it I can not get it to build vacume again. Pretty sure the vacume switch needs replacing but can't find the pump it's not on the hding tank

Come on, noone had to find the pump?

You can't hear the pump running when it does cycle at 1st to get an idea of location....follow the hose? Does it just cycle once when powered on, then no more, even if switched off/on with the pedal held down?

Either way, got be between the crapper and the bucket. Being a maintenance item, should be somewhat accessible.

Mine magically gets macerated and goes out the bottom of the boat Props to the previous owner!!