Fuel Tanks and Accessories

The fuel system is the beating heart of your vessel. A tank is not a simple container but a critical component that must comply with precise standards for sealing and ventilation. When installing a tank, keep in mind that the material must be certified for prolonged contact with gasoline or diesel. Cross-linked polyethylene, for example, offers excellent corrosion resistance and is not affected by the vibration typical of rough-sea navigation, unlike older metal tanks that can trigger electrolysis or internal corrosion.

Model selection must be calibrated to the available space in the locker and to the capacity needed for your cruising range. Always remember to include a safety margin when calculating your engine's hourly fuel consumption. Positioning must allow easy access for periodic inspection and cleaning, an operation that becomes essential on older boats to prevent sludge residue or condensation water from clogging the pre-filter separators.

Nautiba assists you in choosing components for your system. Our technicians review the technical specifications of each component to ensure that fittings, vents, and fuel level senders are compatible with your tank. We are familiar with the problems caused by internal pressure and vacuum buildup, which is why we always verify that every element of the system meets the safety criteria required for recreational boating.

What to check before installing a new tank

• Check the usable space in the locker, including the footprint of fittings and bends in the fill hoses.
• Make sure the tank has a vent with a flame arrestor to prevent hazards during refueling.
• Verify that the material is compatible with the type of fuel used to avoid wall degradation.
• Always install a fuel level gauge that is compatible with the instrument at the helm station.
• Check the diameters of the fill and vent ports to avoid dangerous back pressure.

How do you prevent water from forming in the tank?

Water in the tank forms mainly from condensation caused by temperature swings. To limit this, keep the tank as full as possible during periods of inactivity, and periodically check the condition of the fuel-water separator filter, which must be able to separate water from fuel.

Is a rigid or flexible tank better?

A rigid polyethylene tank is preferred for fixed installations due to its stability and ease of mounting with dedicated straps or brackets. Flexible tanks are useful only as temporary reserves in tight spaces, but require special care to prevent chafing or punctures during movement.

What does a type-approved tank mean?

A type-approved marine tank has passed pressure and fire-resistance tests. This certification guarantees that the container will not release pollutants and is built to withstand the mechanical stresses typical of the marine environment.

Why is the vent so important?

The vent allows air in as fuel is consumed, preventing the vacuum that would block flow to the engine. At the same time, it allows vapors to escape during refueling, preventing the tank from dangerously expanding.

How do you clean a fixed tank?

Cleaning is done through the top inspection port, physically removing deposits accumulated on the bottom. If the tank does not have a large enough inspection opening, you will need to use specific suction pumps to completely empty the contents and remove residual impurities.