Hi, I am adding a
pump out for the
head. I have a tank, through
hull for output, a vent for the tank, and of course the
head. I am adding a valve to select
pump out or
overboard and a vented loop. I have two designs and would like feedback. The first, A, has the vented loop between the valve and the through
hull. Option B has the vented loop between the toilet and the group of valve, tank, and through hull. The tank has a vent that is always open. At first I thought option A would be best, now I am considering option B as it would alleviate back pressure on the toilet from the
holding tank. Your thoughts will be appreciated! Thanks