pump out adapter

[b07llk]

My '99 Regal 402 has standard 1 3/4" deck fitting for pumping out my waste which is fine when I go to a pump out station but now that I have a live aboard slip I would like to use a mobile pump out service however they require I have a 2 1/2" female coupler for their hose. Any suggestions where I can get some kind of an adepter or fabricate one myself. I've been searching the net put no luck yet.

[Randyonr3]

Really simple, go to your local hardware store and look in the plastic pipe area, they will have it in white or in black (PVC).. They will also have it in black pipe or galvinazed but using anything other than a plastic might cause damage to the aluminum deck fitting.....