Flush Mount Plug Housing – White Plastic Recessed Compartment 110×155 mm (Fuel-Resistant)

This recessed pocket (Osculati 20.899.00) is intended to provide a clean and functional deck opening for various purposes – most commonly for fuel and water fillers (tank caps), but also for electrical connectors (e.g., shore power inlet) or other fittings that need to be flush-mounted. The pocket installs into the deck so that its top part (flange) lies flush with the deck surface, and the compartment itself sinks below deck level. The 110×155 mm recess is sized to accommodate a typical tank filler cap – the idea is that when you’re refueling, if you overflow any fuel, it will be contained within this pocket instead of spilling all over the deck. The inner diameter of ~78 mm is wide enough for the neck of a standard fuel cap or a round electrical plug.

The material of the pocket is a special nylon that is hydrocarbon-resistant. This means it won’t be damaged by contact with gasoline, diesel, engine oil, or other petroleum products – critically important if using it for a fuel fill point. It’s also UV-stabilized, so it won’t deteriorate in sunlight. The color is white, which is standard to match most boats, and if needed, it can be painted or tinted to match a particular deck color.

Key technical specs:

• Recess (inner cutout): 110×155 mm – the size of the rectangular hole you’ll need to cut in the deck to fit the compartment.
• Inner circular opening: ~78 mm – the diameter of the round inner well of the compartment, where the filler cap or plug will sit.
• Outer dimensions (flange): 182×136 mm – the size of the rectangular flange that remains visible and sits on the deck. The flange has holes for screws to secure it.
• Depth/height: ~15 cm – the total depth of the pocket; you need that much clearance below deck for installation.

Applications:

• Fuel tank filler: Install the pocket around the deck fill of your fuel tank on a powerboat. Thus, when pumping gasoline/diesel, if there’s any overflow, the fuel stays in the pocket. These compartments usually have a small drain or can be easily wiped out afterward.
• Water tank filler: Similarly, use it for the freshwater fill point – it will prevent water from spilling over wooden deck surfaces or near electronics if you accidentally overfill.
• Electrical inlet: Often yachts have a shore power inlet. This pocket can be used to recess the connector into the hull – keeping it protected and out of sight, and when the cable is unplugged, the pocket’s lid (or the cap on the inlet) keeps moisture out.
• Others: It can double as a small service access – e.g., a pocket for quick access to valves, battery switches, or isolators that you want hidden but accessible. Some even use it as a mini storage cubby for small items (though it doesn’t have a hinged door, the filler cap or plug itself covers the opening).

Installation: Cut a rectangular hole in the deck precisely to the recess dimensions (110×155 mm). Place the compartment by inserting its body into the hole, and align the flange flush with the surface. Ensure it’s oriented correctly (it’s rectangular). Secure it with appropriate screws through the flange’s holes – preferably stainless steel screws with a bit of sealant under the heads to prevent water ingress. If desired, also put a bead of sealant under the flange itself for a fully watertight installation. After mounting, integrate your chosen fitting: fuel cap, water cap, power socket, etc. – these will sit inside the compartment.

With this flush pocket compartment, your deck will have a neater appearance, and functional elements like tank caps will be more protected and out-of-the-way. Aside from the aesthetic benefit, you gain practicality – easier cleanup of spills and better weather protection for key fittings on your boat.