Waste port question

[Mark Tindal]

Hi,
Can anyone help me out?
I want to buy the proper screw in waste adapter for my 220DA 1990 but I don't know which one to get because I don't know the diameter. I'm travelling on business and can't get to my boat to check.

Does anyone know what the right screw in adapter size might be?

I'm looking at these ones provided to me on a Searay Facebook group.

https://www.marinepartssource.com/1...pCwYq4fwiL_3H2Zrhtxyb1nZGd5jJVTdD8cxUfRLT8t4A

https://www.amazon.com/dp/B00NJ7SQV...3bZOdxQjX4yyKZm0uhtYFwCilE_jb0UVlSorkxSoj9iKE

Thank you.

 

[northern]

You do not say where you are from. In Washington State they have a very good system for pumping out your boat at marinas. Most pump out hose ends are a rubber fitting that you put in the suction point on your boat and then you open the valve on the handle. A few places have an assortment of fittings you can screw into the deck fitting. Base on the number of fittings it seems there are many thread sizes but the fitting on the suction hose is standard size at all places. If you do not know the thread size go to Home Depot and get a few plastic screwed fittings you think are the correct size then buy that thread size fitting assembly that has the Hose connector end on it.

 

[Mark Tindal]

You do not say where you are from. In Washington State they have a very good system for pumping out your boat at marinas. Most pump out hose ends are a rubber fitting that you put in the suction point on your boat and then you open the valve on the handle. A few places have an assortment of fittings you can screw into the deck fitting. Base on the number of fittings it seems there are many thread sizes but the fitting on the suction hose is standard size at all places. If you do not know the thread size go to Home Depot and get a few plastic screwed fittings you think are the correct size then buy that thread size fitting assembly that has the Hose connector end on it.

Ah yes, I did forget to say... I'm in the UK, currently on the Thames but will soon be back on the sea at Falmouth in Cornwall.

In my experience, they don't seem to cater from Sports Cruisers and there's never been anything that screws in, that's why I'm looking to buy my own. The DIY shop method is a good idea, just a generic thread with some plumbing aperture maybe. I'll think about that, thanks.

The question of diameter is still important though, without access to the boat right now I cannot guess.

 

[northern]

The threads are standard NPT taper size. If I was to guess I would say 1.5". Assume all boats are the same size
https://www.marinesan.com/Keco-Pump-Out-Fasteners-s/65.htm