Boat Deck Fills, Gas Caps & Tank Keys

Protect boat investments by installing secure, EPA-compliant deck fills from Fisheries Supply, leading supplier of marine gas caps and stainless steel boat water intakes preventing spills, leaks or theft. Discover combination cap/vents plus spare gas cap keys simplifying access and locking marine gas caps deterring siphoning by opportunistic thieves targeting isolated boats. Whether you need sealed, gasketed stainless intakes for freshwater tanks or vapor-tight diesel deck fills meeting USCG mandates, our representatives specify optimal parts compliant across applications - from sailboats to bass boats to pontoons. As specialists equipping boats of all sizes and purpose, Fisheries Supply stocks every deck fill configuration imaginable - including spare gas cap replacements clearly labeled by contents. Invest in durable, precision-built deck fills with fittings tested to maintain leak-free connections, providing proper ventilation while keeping contents safe from contamination. If you are also setting up the tank, browse our great selection of boat fuel tank vents.