"orbital" wrote in message
m...

Some people have expressed concern that it opens up the risk of
getting seawater contamination in heavy seas and that the boatbuilder
probably chose to do this on purpose.

Do you get sea water into your fuel tanks? They are certainly vented
overboard!

The boats I have owned have all had the vents mounted through the hull. If
you want to assure that you don't get any seawater back in the vent then run
the vent line as high as you can, but a vented loop at the top, then run the
line back down to the hull. There is no way that any significant amount of
spray is going to migrate several feet up a hose.

Rod