On Mon, 31 Aug 2009 16:47:31 -0700 (PDT), wf3h
wrote:

or marine heads more appropriately...since i want to elevate the tone
of discussion on this group let me ask a question.

a few years ago there was the 'princess of poop' (i think her name was
peggy) who knew ALOT about marine heads...

anyhow, i have an electric head on the boat which has a 3 gallon
tank. it's filled with water and deodorizer. when the head is
flushed this gets recirc'd through the tank. no connection to raw
water is made. however, there's a direct connection from the rear of
the toilet to a pump out port on the boat but i'm not sure if the tank
on the head can take the pressure of the pump out, so i want to
install a holding tank.

i'm looking at a 6 gallon polypro waste tank with 2 connections and a
vent connection. it looks like these waste tanks are USCG certified
(since there will be no sea connection).

so do i NEED a tank? is the 3 gallon holding thank on the head going
to take the pressure of a pumpout without blowing up?

if i install a polypro tank with no sea discharge is that legal for
USCG cert? (it seems it is).

any hints to ensure no unpleasantness?

Mixing feces, urine and water, then shaking it in a tank and pushing
it through hoses is a recipe with only one result.
And it's not pleasant.
Look at the Airhead. Might fit.
Only thing I would consider for a non-portable head.
But I'm lucky that way. Don't have a boat.

--Vic