Vaccuflush works but no suction

[Jkaz]

I've rebuild my pump bellows, seals and duckbills and have great suction at the pump, the toiled isn't clogged but it wont suck the water out of the bowl unless the boat is on plane the bowl will empty slowly??

What should i check? i did turn the pressure switch knob done some to get more suction, the pump runs continuously too.

2006 340

 

[R-and-R]

I've rebuild my pump bellows, seals and duckbills and have great suction at the pump, the toiled isn't clogged but it wont suck the water out of the bowl unless the boat is on plane the bowl will empty slowly??

What should i check? i did turn the pressure switch knob done some to get more suction, the pump runs continuously too.

2006 340

Are you sure that the toilet is draining into your holding tank when you are on plane?
It sounds like a leaking hose between your vacuum-pump and the toilet.

 

[Jkaz]

no septic leaks into the bilge,it will suck down a little if it sits a while but the pump never shuts off during this time. i can put my hand over the suction line at the system and its sucking great there but from the hose up nothing? Ill check the hose and make sure it not off or sucking air

 

[stephens013]

I've rebuild my pump bellows, seals and duckbills and have great suction at the pump, the toiled isn't clogged but it wont suck the water out of the bowl unless the boat is on plane the bowl will empty slowly??

What should i check? i did turn the pressure switch knob done some to get more suction, the pump runs continuously too.

2006 340

My 400DA had that issue. Turned out being a ruptured line between the head and the vacuum generator. I was able to splice a couple pvc couplings a hunk of hose to plug the leak; get it functioning.

 

[Darrenfon]

Seems pretty clear that a leak in the sanitation hose between the vacuum generator and the toilet is the most likely culprit.

 

[Jkaz]

I'll dig into it thanks guys

 

[markrsimon]

You also could have a loose fitting, where the hose / duck bills / pump all connect together, or a loose hose clamp in that area.

I would look for a way to close off the system at the accumulator tank - and make sure it builds pressure and the pump turns off. While it might be challenging to set this test up - it beats replacing the waste line if thats not the issue.

Pull the toilet waste line off the accumulator tank - and find something flat, perhaps rubber on one side to seal up against the open connector. Or maybe a short section of hose, where you can fold over the end to semi-seal things off? What ever you can find that works.

 

[Darrenfon]

You also could have a loose fitting, where the hose / duck bills / pump all connect together, or a loose hose clamp in that area.

I would look for a way to close off the system at the accumulator tank - and make sure it builds pressure and the pump turns off. While it might be challenging to set this test up - it beats replacing the waste line if thats not the issue.

Pull the toilet waste line off the accumulator tank - and find something flat, perhaps rubber on one side to seal up against the open connector. Or maybe a short section of hose, where you can fold over the end to semi-seal things off? What ever you can find that works.

For some reason I thought he had already tried this, but rereading it I don't get that impression. Good call on making sure he does that before replacing the waste line.

 

[Jkaz]

Yes good ideas.. will do that first thing

i just have great suction right there at that plastic fitting that im thinking its up near the toilet

 

[Darrenfon]

Yes good ideas.. will do that first thing

i just have great suction right there at that plastic fitting that im thinking its up near the toilet

So, did you get it figured out?