Collection: Deck Fills

Keeping fuel, water, and waste systems properly sealed starts at the deck, and choosing the right fitting for each port matters more than most boaters expect. Whitecap and Sea-Dog cover the core bases with flip-top, push-up, and pull-up designs in stainless steel, available for gas, diesel, water, and waste lines in 1-1/2" and 2" hose sizes. Scanstrut's Roam Series brings a different approach with dedicated city water inlets and gravity fill options, which suit liveaboard setups or boats that regularly connect to shore water. Before buying, match the hose diameter exactly, confirm the fluid type label (gas, diesel, water, and waste fittings are not interchangeable), and check whether the install location calls for a straight or angled mount like the Whitecap EPA 30-degree pull-up.

Material and mechanism are the other two decisions. Stainless steel holds up better in saltwater environments and stays presentable on finished decks. For mechanism, flip-tops suit high-traffic ports, push-ups offer a low-profile flush fit, and gravity fills work where pressure filling is not needed. Sea-Dog also stocks lever rebuild kits for flip-top fills, which is worth noting if you are servicing an existing fitting rather than replacing it. Perko rounds out the brand selection for boaters who prefer to stay with a single trusted name across deck hardware.