Deck Filler, locking, AISI316

This stainless steel deck filler with a lockable cap provides a secure solution for sealing your boat’s fuel or water tank inlet. Crafted from AISI 316 marine-grade stainless steel with a polished finish, it offers superior resistance to rust and the elements while adding a sleek look to your deck. The filler cap is equipped with a locking mechanism that opens with a provided key, ensuring that your tank remains closed to unauthorized access or accidental opening.

Designed to accommodate different system requirements, this deck fill is available in two standard hose connection sizes: 38 mm (1-1/2") and 50 mm (2"). Choose the 38 mm version for most small to medium boats (common for fuel or water lines), or the larger 50 mm version for vessels with high-capacity tanks or larger filler hoses. In both sizes, the unit features the same robust construction and an easy-to-use lockable cap.

The cap is clearly marked for its intended use – you can select a variant labeled for Fuel or for Water, according to your needs. This ensures that you and others can easily identify the correct fill point (for example, avoiding confusion between a diesel fuel fill and a water fill). The locking cap safeguards your tank contents: it cannot be removed without the key, serving as a security measure against fuel theft or tampering. A built-in O-ring on the cap creates a watertight seal, preventing rain or seawater from entering the tank.

Installation is simple and secure. The deck fill has a flush-mount flange with pre-drilled holes for fastening with screws. Once installed, it sits nearly flush with the deck for a clean appearance and to avoid tripping hazards. This product is ideal for boat owners looking for a reliable, heavy-duty deck fill. Use the 38 mm variant on typical powerboats or sailboats up to around 8–10 meters, and the 50 mm variant on larger boats or when faster fueling is required. With its lockable design, it is highly recommended for boats kept at shared docks or for any fuel tank that needs extra security and safety.