ISURE MARINE Boat Fuel Deck Fill FUEL 1-1/2" Mirror-Polished 316 Stainless Keyless Cap O-Ring Seal

ISURE MARINE's 1-1/2" (38mm) keyless deck fill is a mirror-polished 316 stainless steel filler for gas, diesel, water or waste tanks that locks in a secure O-ring seal while remaining simple to open without a key.

Upgrade the look and reliability of your boat, yacht, RV or trailer with a purpose-built deck filler that resists saltwater corrosion and presents a contemporary, flush-mounted finish. This ISURE MARINE deck fill is cast from marine-grade 316 stainless steel, hand-polished for a mirror surface, and engineered with a high-grade O-ring and stainless steel chain to keep the cap secure and watertight.

How does this deck fill resist corrosion in saltwater environments?

The body and cap are made from 316 marine-grade stainless steel, chosen for superior resistance to pitting and corrosion compared with standard stainless. A precise lost-wax casting and polished finish further reduce exposed crevices where corrosion can begin.

• 316 stainless composition designed for marine use
• Lost-wax casting gives uniform metal density
• Hand mirror polishing minimizes surface imperfections
• Stainless retaining chain prevents cap loss and wear

Is the cap easy to operate and leak-resistant?

The cap uses a keyless lift-and-turn tab so you can open or close it quickly without tools or keys. Inside the cap is a high-grade O-ring that compresses against the filler throat to reduce leaks and keep contaminants out of the tank.

• Keyless design: lift tab then turn to operate
• High-grade O-ring provides reliable sealing
• Durable torsional strength for repeated use
• Chain-attached cap prevents accidental loss

Will it fit my tank and how is it installed?

This deck fill is sized for a 1-1/2" (38mm) tank opening and includes a rubber gasket and three mounting screws for a flush installation. The flange diameter and fastener pattern are designed to recess neatly into modern decks; check your tank throat diameter and screw spacing before fitting.

• Threaded tube length: approximately 3.15" (80mm)
• Flange outside diameter: approx. 2.91" (74mm)
• Mounting screws: three screws supplied, triangular pattern
• Fastener hole spacing: ~2" (52mm) between screws

What fluids and vehicles is this compatible with?

The faceplate is labeled for Gas / Fuel / Diesel / Water / Waste to simplify use across multiple tanks. Its materials and seal make it suitable for fuel and fresh water systems as well as utility tanks on boats, yachts, caravans and trailers.

• Compatible with gasoline, diesel and many fuel blends
• Suitable for water and non-potable waste tanks
• Common fit for boats, yachts, RVs, caravans and trailers
• Labelled face simplifies identification at fill points

Who is this for? If you own a boat, yacht, caravan, campervan, trailer or any vehicle with a 1-1/2" (38mm) tank opening and you want a long-lasting, corrosion-resistant deck fill that looks polished and works without a key, this ISURE MARINE deck filler is designed for you. Installers and DIYers will appreciate the included gasket and screws; owners will value the durable 316 stainless construction, secure O-ring seal, and tidy flush-mounted appearance.