I am going to install a new holding tank
for the head
and wish to make it a pump-in, gravity-out
system to keep things simple. It will have the option of deck
pump-out but normal use will be gravity out from the holding tank
to the thru hull
which will be directly below the tank, about 2 feet away.
My current thru hull
is 1 1/2 inch with the usual restrictions with the tail pieces to 1 1/2 hose. Should I change it to a 2 inch thru hull
and hose or is the 1/1/2 inch thru hull
sufficient? If I am going to change it, I would rather do it now than later but a 2 inch valve looks huge. Thanks.