Dick wrote:

I don't use any chemicals. I think that if you have the right kind of hoses you
won't have a problem. Some hoses will pass gass threw the connections or the
walls. We use only some white vinegar once in awhile to keep the pipes from
clogging up with salt. Our vent pipe is only half and inch so I don't think
that it gets that good of ventaltion. The tube gets water in it part of the
time. We lived aboard for six years so it has been used, but we don't have an
odor problem.

I suspect that anyone anchored downwind of you might disagree. 'Cuz
the fact that you don't have any odor INSIDE the boat does not mean none
belches out the tank vent each time the head is flushed.

In fact, holding tanks are rarely if ever the source of odor inside a
boat...'cuz unless the tank is leaking, the only place odor from inside
the tank has to go is out the tank vent.

--
Peggie
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Peggie Hall
Specializing in marine sanitation since 1987
Author "Get Rid of Boat Odors - A Guide To Marine Sanitation Systems and
Other Sources of Aggravation and Odor"
http://www.seaworthy.com/html/get_ri...oat_odors.html