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Old 11-01-2018, 06:54 PM   #16
Larry M
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City: Jacksonville
Join Date: Nov 2008
Posts: 11,682
Quote:
Originally Posted by twistedtree View Post
I carried the same spares. After one duck bill valve replacement, the pump worked well for maybe 6 mo, then struggled to draw up the goo. This was gray water, by the way, aimless gooy than you might imagine.

I replace the duck bills again to no avail, then replaced the bellows. It still wouldn’t suck worth a darn. Sick of wasting time, I replaced the whole pump.

I think those pumps are fine for an intermittent use boat, but for heavy use something more robust is required.
We used ours full time for 5 years when we were outside the US and never had a failure or repair on our black water tank. Is there a better pump out there for over the side waste?

I did have to replace the duck valves after year 7. We were back in the States and closed/locked out the discharge thru hull. Once off shore, I went to dump the tank and the duck bills inverted instantly.
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