It has come time to locate and install the vents for the diesel tanks. There are two tanks, one each, port and starboard. The fills are located in the side decks. I am using Vetus splash guards. The top of the tanks are about 16 inches below the underside of the side decks. This is new construction, a center cockpit sailboat. The tanks are outboard of the cockpit.
Where do I locate the vents? If in the topsides, they will be about 4 inches below the deck due to the width of the carlin and deck thickness. There would only be room for a 3-inch high inverse loop. If ever sailed “rail down” I fear water incursion into the tanks. If located in the cockpit combing, there may be the constant odor of diesel whenever one is in the cockpit. The third choice is to locate the vents in the topsides, but loop the hose to the top of the combing. This does not feel like a clean solution and adds about 4 feet onto the length of the vent hose.
This is only my second boat and I need your thoughts, suggestions.