Moeller Permanent/Below Deck Tanks
Moeller Permanent Below Deck Fuel Tanks: Built-In Innovation for Serious Boaters
When it comes to permanently installed, below-deck marine fuel storage, Moeller Marine stands in a class of its own. Unlike traditional aluminum tanks that are constrained by rigid fabrication methods and susceptible to corrosion over time, Moeller's permanent below deck tank lineup takes a fundamentally different approach — one built around rotationally molded, cross-linked polyethylene and a suite of proprietary fitting technologies that set the standard for the industry.
Cross-Linked Polyethylene: The Material Advantage
The foundation of every Moeller permanent below deck tank is its construction material. Rotationally molded, cross-linked polyethylene delivers several meaningful benefits over aluminum. This manufacturing method allows for complex shape designs beyond conventional and restricted aluminum tanks, meaning Moeller can produce tanks optimized for the tight, irregular spaces found in boat hulls. All models feature ethanol and biodiesel compliant corrosion and pit resistance, making them well-suited for today's fuel blends. Manufactured from marine-grade cross-linked polyethylene material, these durable below-deck tanks meet and exceed all industry standards.
Moeller Tite™ and Hose Tite™ Proprietary Fitting Systems
One of the most distinctive features of Moeller's permanent below deck tanks is the exclusive Moeller Tite™ fitting system. These tanks feature corrosion and pit resistance with exclusive Moeller Tite pioneering, and each tank is equipped with an electrical sending unit compatible with industry-standard dash-mounted gauges, Hose Tite, machined aluminum fill spouts, withdraw, and vent fittings molded directly into the shell. By integrating the fittings into the shell itself rather than attaching them separately, Moeller eliminates a common failure point found in conventional tank designs.
Each tank is complete with Hose Tite™, machined aluminum fill spouts, withdraw, and vent fittings molded directly into the shell. The machined aluminum 3/8" withdraw fitting is another standout detail: it features 360° rotational capability for hook-up convenience, giving installers maximum flexibility in routing fuel lines in confined below-deck spaces.
Industry-Leading Fitting Tolerances and Fuel Flow
Moeller doesn't just meet industry fitting standards — it sets them. Their fittings hold the highest O.D. and I.D. tolerances in the industry, ensuring the highest level of input flow available during tank refueling. This precision engineering means faster, more reliable refueling and a tighter, leak-resistant system throughout the life of the installation.
Integrated Sending Units and Gauge Compatibility
Moeller permanent below deck tanks come ready for the dash. All tanks have a 5-hole reinforced sending unit calibrated for the industry-standard 33–240 Ohms, compatible with all of the most popular gauge lines such as Teleflex and Faria. This plug-and-play compatibility reduces installation time and ensures accurate fuel level monitoring from the helm.
Secure Installation and Regulatory Compliance
Proper tank retention is critical in a marine environment. Convenient hold-down grooves are molded directly into the tank shell, working seamlessly with Moeller's Permanent Fuel Tank Hold Down Kit (Part No. 035710). When it comes to compliance, Moeller leaves nothing to chance: these tanks conform to all ABYC, NMMA, and U.S. Coast Guard regulations and are available with CE certification.
A Wide Range of Capacities
Moeller produces both portable and permanent fuel tanks, including topside and below-deck models with capacities suited for many boat sizes and layouts. The permanent below deck lineup spans from compact 12-gallon models all the way up to 27-gallon and larger configurations, with a variety of dimensional footprints — tall and narrow or wide and low-profile — to fit virtually any hull compartment. Moeller's Permanent Below Deck Fuel Tanks are favored by quality boat builders precisely because this breadth of options simplifies both OEM installations and aftermarket replacements.
Whether you're replacing an aging tank on a classic cruiser or specifying fuel storage for a new build, explore the full selection of permanent and below deck fuel tanks or visit the Moeller Marine brand page to discover their complete lineup of marine fuel system solutions.