316 Stainless Steel Marine Deck Filler with Key Chain for Fuel, Water and Waste
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Putting diesel in a water tank — or petrol in a diesel engine — is an expensive mistake that happens more often than it should. The 316 Stainless Steel Marine Deck Filler prevents cross-contamination with clearly engraved cap labels (PETROL, DIESEL, WATER, GAS, WASTE), so anyone filling the tank knows exactly what goes where. The keyed cap and attached safety chain mean the cap stays with the fitting and only opens when you want it to.
Sealed, Labeled, and Secured
The O-ring seal keeps fluids in and water out — critical for deck fittings that sit exposed to rain, spray, and wash-down. Built from marine-grade 316 stainless steel, the flange and cap resist saltwater corrosion and maintain their polished finish through seasons of use. Three hose sizes cover the full range of marine plumbing from small day boats to large yachts.
Key Features
- Engraved Fluid Labels — PETROL, DIESEL, WATER, GAS, WASTE; prevents cross-contamination at the fill point
- O-Ring Sealed Cap — Leak-proof closure; keeps water out and fluids in
- Keyed Cap with Safety Chain — Restricts access and prevents cap loss during filling
- 316 Stainless Steel — Corrosion-resistant in saltwater and marine environments
- Three Hose Sizes — Fits 1-1/2", 2", and 2-1/2" (Diesel only) standard marine hoses
Specifications
- Material: 316 Stainless Steel
- Finish: Polished Silver
- For 38.1mm (1-1/2") hose: Flange Ø83mm | Cap H 5.7mm | Overall H 75mm
- For 50.8mm (2") hose: Flange Ø88mm | Cap H 5.7mm | Overall H 82mm
- For 63.2mm (2-1/2") hose (Diesel only): Flange Ø89mm | Cap H 6mm | Overall H 108mm
Common Applications
- Fuel Tanks: Petrol and diesel fill points on powerboats, sailboats, and yachts
- Fresh Water Tanks: Potable water fill for cruising and liveaboard vessels
- Waste & Gray Water: Pump-out and waste tank access on larger vessels
Need other deck filler styles? View our full Deck Filler collection, or contact us for OEM marine hardware projects and quantity pricing.
Note: Select hose size to match your existing tank plumbing. Due to manual measurements, please allow for slight size tolerance.