Originally Posted by KISS
Have you ever seen this set up on a boat? It seems like a fairly obvious solution to the backflow problem on smaller boats, but I'm not aware of anyone doing it.
Backflow is still going to be a problem regardless of drain size if the cockpit
height is marginal or the drains are in the wrong place. A check valve or something might work, but at the end of the day either fix the issue or close the valves in good weather
and open them if you think a wave is going to come into the cockpit
or during rain. Fit a small bilge pump
to deal with spray and rain...
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