I have done this 4 different ways. I have put in the
Jabsco shower sump. It fit the space well and cost me about $120. So far so good
I also built a box out of
fiberglass to fit an odd shaped space. I installed a round
deck plate with o ring seal on the top of the box to get access for installing the
bilge pump and float .For a
screen, I used a piece of
aluminum window
screen zip tied to the inside of the
thru hull. I like using the Attwood double-ended through
hull connector, part number 3878-3. You can attach the hose from the
shower drain to the outside of one of these connecters, and the screen on the inside. A second one of these connectors is connected to the
bilge pump output, then on the outside of the sump you attach the hose that goes to the through
hull above the
water line.
For a bigger sump I bought a 3 gallon tank from tank depot instead of making my own.
finally, for a big bathtup I used a
Rule 17A
pump, It has a 1 1/2 input and output. Between the bathtub and the
pump I put in a Shurflo strainer 253-401-01. This pump has to be installed below the
water level of your tub or
shower. It moves water very fast, and I wired it to a 25 amp circuit breaker switch. No float switch. You just turn it on when you get out of the bathtub. This cost about $300--expensive but works very well.