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#1 2007-09-27 08:44:20

tboicey
Member

Holding tank vent pipe blocked?

(The boat is a MkI with the Prototank recirculating system...)

When I return to the boat weekend to weekend, there is a strong head smell in the cabin. With a bit of tank deodorant, a lot of flushing, and opening all the hatches... it more or less disappears and the boat is usable.

However, I noticed that there is no odour detectable at the outlet of the head vent on the side of the hull.

Could I assume the vent line is blocked and this is possibly a factor?

Is it safe to "rod out" the vent line with a coat hanger or similar?

Cheers.

["Cheers" suggests "Down the hatch", which suggests other remedial measures involving suction. I'm staying out of this discussion. - Admin]

Last edited by (2007-09-27 12:30:24)

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#2 2007-10-21 11:29:48

Guest

Re: Holding tank vent pipe blocked?

I would think a blast of air or perhaps a powerwasher would be safer than rodding. I experienced a similar condition and eventually realized the sanitation hoses become odor permeable with age. Antifreeze also shortens the odor proof life of hose. Test the hoses with a hot wet rag at low points and sniff the rag afterwards. Good  hose is only odorsafe for a few years ,even the best at about $9 per ft is only waranteed for 5 yrs.

#3 2007-10-21 16:12:56

tboicey
Member

Re: Holding tank vent pipe blocked?

Thanks for the tips. I may have to wait until next year...

From an earlier piece of advice, I cleaned the wasps nest out of the end and forced a bit of water in with a water hose pressed against the vent.

Since then I haven't had any odour, although the head also hasn't been used and the weather has been cooler...

So I may have to wait until next year... I also plan on switching the flushwater from recirculation to fresh water, so I might find other nasties along the way.

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