Convert grey water holding to overboard discharge

[jasrri]

My 2001 Larson 330 Cabrio was constructed with a grey water holding tank (Lake boat set-up), which I would like to convert to an overbaord discharge. What is involved and level of difficulty? Please advise. Long Island South shore boater!

 

[tim f]

It is pretty simple. I did the same with my two grey water tanks. I drilled a hole in the top of the poly tank and installed a uni-seal, piece of 1/2" (I think) PVC pipe with the end that goes into the tank cut on an angle. On the other end I attached one of those QD 90 degree fittings. Ran tygon tubing for the QD to a pump (3.5 gpm), and from there overboard. I throw a switch when I want to pump it overboard. I can give you more details later, as I am at work and don't recall all the sizes, etc.