Sea Bandit
New Member
- May 13, 2009
- 6
Just purchased a 1988 300 Weekender and 5 days into purchase vacuum flush system does not create vacuum, any ideas or thoughts are appreciated.:huh:
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If your system continually runs, it's the vacuum swith on the tank.
I would disagree... it can actually be caused by several things preventing the vacuum tank from producing a vacuum... like bad duckbill valves, bad bellows, or something stuck in the duckbill valves such that they won't close all the way...
Or a crack in the plastic 90* elbow that leads into the vac tank...:smt101
I have a similar problem. I have a S type vacuum pump from Sealand. It worked OK for 2 days (boat was de-winterized recently and put in water 3 days ago). The pump starts every 10-15 minutes. This is what I have done up to now:
- Everything is fine with the toilet, no lost of water, no hissing sound
- The pump motor is working fine
- Replaced the hose between the vacuum tank and the pump assembly since there was a small hole under a collar. I still have the same problem
- I hear a a slight hissing sound that seems to come from the pump assembly. I opened the pump cover and the hissing sound is louder.
- Now I suspect:
- defective duckbill valve
- O-ring
- ??
What do you think ?