Once known as Hartley18
Join Date: Aug 2007
Location: Melbourne, Australia
Thanked 65 Times in 65 Posts
Rep Power: 10
Gas bottles really should be elevated slightly above the floor of the locker on a low plastic/fibreglass plinth, away from the water getting in (presumably only a small amount). Stainless steel tanks are available in some places but do tend to be a little expensive..
You can probably install a flapper valve (piece of plastic on a hinge over the outside of the vent hole) that will allow stuff out but very little back in. That, plus the low plinth, should be enough to stop your tanks rusting out.
"Honestly, I don't know why seamen persist in getting wrecked in some of the outlandish places they do, when they can do it in a nice place like Fiji." -- John Caldwell, "Desperate Voyage"