Moeller 032518 Below Deck Marine Fuel Tank 18 Gallon Cross-Linked Polyethylene

The Moeller 032518 is a permanent, below-deck marine fuel tank built from rotationally molded, cross-linked polyethylene — a construction method that enables complex shapes while delivering superior corrosion and pit resistance compared to traditional aluminum tanks. With its low-profile design measuring 36.5" L × 18.25" W × 7.25" H, this tank installs cleanly into tight below-deck spaces on a wide range of vessels.

All fittings are molded directly into the tank shell, including Hose Tite™ machined aluminum fill spouts, a 3/8" withdrawal fitting, and a vent fitting. The machined aluminum withdraw fitting features 360° rotational capability, making fuel line hook-up fast and convenient. All fittings meet E10 ethanol compliance requirements, ensuring long-term compatibility with modern gasoline blends.

Key Features:

• Rotationally molded cross-linked polyethylene construction — corrosion and pit resistant
• Hose Tite™ machined aluminum fill, withdraw, and vent fittings molded directly into shell
• 3/8" machined aluminum withdraw fitting with 360° rotational capability
• E10 ethanol-compliant fittings and materials
• Suitable for gasoline or diesel use (diesel applications require Fuel Return Kit Part No. 035724-10, sold separately)
• Hold-down grooves molded into tank shell — compatible with Moeller Tank Hold Down Kit (Part No. 035710 or 300110, sold separately)
• Includes sender, pick-up, Fill Limit Vent Valve (FLVV), and Grade Vent Valve (GRV)
• Conforms to all ABYC, NMMA, and U.S. Coast Guard regulations
• Available with CE certification

The Moeller 032518 below-deck boat fuel tank is a reliable, regulation-compliant solution for permanent marine fuel storage, engineered to deliver lasting performance in demanding on-water environments.