Gary Warner wrote:
"Peggie Hall" wrote in message
...


Out a through-hull is the best place for a water tank vent...into the
bilge a VERY poor second.

Why is the bilge such a poor second? The water goes in the bilge. The
bilge pumps pump it out. What's the problem?

The problem is bilge pumps DON'T pump ALL the water out...which is why
most people do everything possible to keep as much water OUT of the
bilge as possible. 'Cuz the less water that goes into one, the less
there is to turn into a dark smelly swamp.

Aside from the problems with galley-sink and shower that you
mentioned how do these locations disallow you from flushing the
water vent by overflowing the tank as you fill it? You overflow
the tank, it goes into the sink/shower and the vent is flushed, no?

Provided you remember to turn on the sump pump--not too soon, or the
impeller will fry...too late and dirty water in the sump will combine
with the water in the vent and can get back into the tank and
overflow...break out the mop. As often as all of us just stick the hose
in the water fill and and forget it till water running out the vent
reminds us to turn it off, how many of us are that good?

Venting it overboard is the only solution that doesn't create more
problems than it solves.

--
Peggie
----------
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://69.20.93.241/store/customer/p...40&cat=&page=1