BocaJack wrote:
Only toilets designed to use pressurized flush water can safely be connected to the fresh water system...and
there is no manual toilet designed to use pressurized flush water.

I'm obviously confused.

Pressurized flush water? What do you mean by this?


Don't the electric pumps force air into the water tanks and push it
up?

Nope. There are raw electric toilets that PULL in sea water...and there
are toilets designed to use pressurized flush water that tap into a
fresh water line, and have a electric solenoid valve that acts like a
faucet. They can only be used on boats that have electric fresh water
pumps, and only when the water pump is on to keep the fresh water system
pressurized.

If the electric pump is off, does this mean the water system is no
longer "pressurized"? How does it work?

It doesn't. The water pump must be on to keep the fresh water plumbing
pressurized.

For some reason, a lot of sailors think that leaving the fresh water
pump on is a bad idea...they only turn it on when they need to run
water. THAT's a bad idea...'cuz the fresh water system loses pressure
every time the pump is turned off...so it has re-pressurize the system
every time it's turned back on, which is a lot of extra work for the
fresh water pump, shortening its life. But if the p0ump is left on, the
only time it has to run is when qa faucet is opened...to
restore/maintain pressure caused by running water.

Same is true of a fridge, btw...the hardest work a fridge compressor has
to do is chill a warm box. So leave it on...the compressor only has to
maintain it.

--
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://shop.sailboatowners.com/books...ku=90&cat=1304