Disgusting Head

[cornachio]

When left for an hour or so. my head fills with material from the holding tank (UGGHH!). Fortunately, it does not overflow. The boat is model 40.3, year 2005, head brand Jabsco. I replaced the original chocker valve (which had no obvious defects) which solved the problem, but only for two weeks or so. Now, it's baaaaack. Any ideas or suggestions?

[Sasha_V]

Your holding tank is possessed.

Check your holding tank vent, sounds like back pressure is pushing things back form wence they came.

[camaraderie]

Yup...clean out the vent hose and relieve the pressure...Sometimes a snake type tool is needed to do this. Stand aside when you clear the hose!!

[Bob1112]

I have exactly the same problem. When the remnants of that hurricane came through a few weeks back, the bouncing around caused the head to overflow onto the deck. Nice. Maybe it's a vent problem, but doesn't the head discharge to the top of the tank? Or does the tank inlet pipe extend all the way to the bottom? If so, why? After all, nobody wants the stuff to go the other way (unlike a fuel or water tank).

[camaraderie]

Doesn't matter...if tank is air tight as it will be with vent blocked, the air has nowhere to go and as you pump "stuff" in ...the air becomes compressed, jamming the head.

[g_weier]

We have a SO35 2004 and had the same problem. I also rebuilt the unit with no long term effect. But we did find a few good practices that will help. First I put an in-line chemical treatment, this put a dose in thru the flush water. Works great. Second and what fixed our back flow issue was to use the flush water mode first and ONLY use the purge to clear the bowl. We use to pump frantkly air into the lines. Since then, no back flow and the bowl is low level.

[shuttersailor]

I have a 2002 43DS.... same problem on both heads every year.... finally learned that there are TWO duck bills on each head, one right behind the head and one further up the line. I am haveing a senior moment...can't remember exactly where the second one is (must have been covered with poo at the time thus blocking the memory out!) I have found that As long as I replace both once a year, I am ok...at least last year anyway.

Shuttersailor

[Giulietta]

That's French boats for you.... you buy them... you give them love....you are proud of them.....

What do they do???

They **** on you.....tsc tsc tsc