Deck fillers and accessories

Deck fillers are key for the safety and functionality of your onboard liquid storage. Often overlooked, they are vital when the old one breaks or loses its seal. At Nautica Basile, you'll find genuine Osculati replacements for water, fuel, and diesel, along with complementary accessories. Available in different sizes (neck diameters from 38 to 60 mm and larger) and materials (chrome-plated brass, AISI 316 stainless steel, durable plastic).

Carefully check the neck diameter, thread type (gas, conical, etc.), and material of your original filler before ordering a replacement. An incompatible filler can cause leaks and, in the case of fuel, a serious hazard. Ensure compatibility with the liquid.

If you're looking for a locking deck filler for security, verify that the lock uses corrosion-resistant marine-grade materials. Cheaper models can seize due to salt and rust. Also, consider a filler with an anti-loss system.

Besides fillers, we also offer related accessories, such as tank vents, replacement gaskets, filler keys, and hose adapters. Our products are chosen for quality and durability.

Nautica Basile's Advice

• Fast Shipping: Orders before 12:00 PM usually ship the same day.


• Warranty: All products have a legal warranty.


• Technical Assistance: Questions about compatibility? We're nautical experts since 1982 and can help you find the right solution!

Complete the installation with our approved fuel hoses, AISI 316 stainless steel hose clamps, and quality fittings for a safe liquid storage system. Maintain your boat deck fillers and accessories to prevent issues.

What product should I use to clean chrome-plated brass deck fillers without damaging them?

To clean chrome-plated brass deck fillers, avoid harsh products that could scratch the finish. Use a soft cloth with lukewarm water and mild soap. Dry to prevent stains. You can also use products for chrome-plated brass, following the instructions.

How do I know if my water tank deck filler is no longer watertight?

If you notice water leaks, or if the water tastes strange, the filler is likely not watertight. A leaking filler can contaminate drinking water. Replace it immediately.

Are all fuel deck fillers the same?

Absolutely not. Fuel deck fillers must meet regulations (e.g., ISO 8099) to prevent fuel leaks, which could cause fires. Verify that the filler is approved and compatible with the fuel (gasoline or diesel). An incorrect filler may not seal or may react with the fuel.

How do I choose the most suitable deck filler for my tank?

To choose the right boat deck filler, consider the tank neck diameter, thread type (gas, conical, etc.), tank material (plastic, stainless steel, etc.), and the liquid (water, fuel, diesel). Consult your tank specifications or our customer service for help.

What are tank vents and what are they for?

Tank vents allow pressure compensation inside the tank due to temperature or liquid consumption. Vents prevent vacuum or overpressure, which could damage the tank or cause engine problems. Vents are important for fuel tanks.

What product should I use to clean chrome-plated brass deck fillers without damaging them?

To clean chrome-plated brass deck fillers, avoid harsh or abrasive products that could scratch or dull the finish. Use a soft cloth dampened with lukewarm water and mild soap. Dry thoroughly after cleaning to prevent stains and streaks. You can also use products specifically designed for cleaning chrome-plated brass, carefully following the manufacturer's instructions.

How do I know if my water tank deck filler is no longer watertight?

If you notice water leaks around the filler area, or if the water in the tank tastes strange or has an unpleasant odor, it is likely that the filler is no longer watertight. A leaking filler can cause contamination of drinking water and promote the growth of bacteria. Replace it immediately to avoid health problems.

Are all fuel deck fillers the same?

Absolutely not. Fuel deck fillers must comply with specific regulations (e.g., ISO 8099) to prevent fuel leaks and spills, which could cause fires or environmental damage. Always verify that the filler is approved and compatible with the type of fuel (gasoline or diesel) used on your boat. An incorrect filler may not seal properly or may react chemically with the fuel.

How do I choose the most suitable deck filler for my tank?

To choose the most suitable deck filler, you need to consider several factors: the diameter of the tank neck, the thread type (gas, conical, etc.), the tank material (plastic, stainless steel, etc.), and the type of liquid contained (water, fuel, diesel). Consult your tank specifications or contact our customer service for assistance in choosing the right filler.

What are tank vents and what are they for?

Tank vents are devices that allow you to compensate for pressure variations inside the tank due to temperature changes or liquid consumption. Vents prevent the formation of vacuum or overpressure in the tank, which could damage the tank itself or cause engine supply problems. Vents are particularly important for fuel tanks.