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Hello all,

I've scoured the internet in search of a scupper/flapper valve replacement for my 1989 Full Cabin 27. The drain looks like an extended piece of PVC pipe that runs several inches outside the transom. I have one flapper valve on there now which is actually an exhaust flapper valve like the one in this link: https://www.westmarine.com/buy/sierra...80_011_525

The OD for the drain pipe is 2 1/2 inches and the only flapper valve replacements I've found are 3" and 4".

Has anyone replaced one of these and found a flapper valve that is 2 1/2 inches? Or have you just used the 3 inch and tightened it down really tight? This is one area that I don't want to miscalculate.

Thanks in advance for your help!

Chris