Most boats that do have "above water line" scupper outlets do so through the transom, or just above the LWL below the bootstripe to address the staining issue.
Minimizing below the water throughhulls does have it's appeal......
05-07-2009 11:12 AM
Another reason to have your cockpit drains below water line is so they will still drain when heeled over. If the hose run is too flat it might end up being uphill. I thought about moving ours too until I started figuring out the angles (glad Ted Brewer designed the boat and not me).
05-07-2009 10:37 AM
The one major reason many choose to have them drain below the water line is that the outflow from them can stain the hull.
05-07-2009 09:47 AM
Moving Scupper Drains to Above Waterline
Eventually, like maybe next year, I'll have to replace the through hulls for my cockpit scupper drains. Right now they are located P/S below water line. My sink drain also drains into the cockpit drain through hulls.
I currently have 6 thru-hulls that are below waterline; head water in-take, head sink drain, waste overboard, raw water for engine, and the two scupper drains. I'd like to minimize the number and have only the raw water intake and head intake below the waterline, and put everything else just at or slightly above the waterline.
I am not talking about eliminating the seacocks that go with each thru-hull and having a direct connection, just relocating the thru-hull/seacock assembly.