Went for a Blake Lavac Zenith for the aft head - simple and mechanical
and only 10 euros at an NL boat jumble. Bought 2 new seals - cost more
than the Zenith. Intake water is sucked from a 6 litre domestic loo
cistern which is plumbed directly into FW supply - just like at home
(fresh water capacity is 6500 litres, so I guess a little more than the
average yacht). Outlet has Y valve to tank - 2800 litres!!! or
discharge overboard via syphon loop. Pics etc at
http://www.rmstone.screaming.net/int...internal1.html

wrote:

Went for a Blake Lavac Zenith ... Intake water is sucked from a 6 litre domestic loo
cistern which is plumbed directly into FW supply - just like at home...

Connecting ANY toilet not specifically designed to use pressured water,
or a flush water tank, to the potable water supply is very risky...cuz
there's nothing to prevent bacteria from the bowl from migrating into
the potable water supply. In fact, every mfr of raw water toilets
specifically warns against connecting the toilet or any toilet plumbing
to the fresh water supply.

I know yours is "buffered" by a separate tank, but if bacteria migrate
into that tank, they can also migrate into the plumbing.

A safe way to do it would be to y-valve the flush water tank fill into a
sink drain line...run water down the sink to fill the tank. You
accomplish the same thing without exposing the potable water supply to
contamination.

--
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/store/custo...0&cat=6&page=1
http://shop.sailboatowners.com/detai...=400&group=327