Permanent below deck fuel tanks with molded-in hold down grooves for secure mounting.Moeller permanent tanks are favored by quality boat builders. They are made of cross-linked rotationally moldedpolyethylene that is impervious to corrosion and ethanol-enhanced fuel. Tanks meet all ABYC, NMMA and U.S. CoastGuard regulations. They come equipped with an electrical fuel sending unit for use with a dash-mounted gauge.When selecting a tank, bear in mind that tank dimensions do not include fittings, so for the true height of thetank, add 2 1/2" for the fill neck—and add 3% to measurements to compensate for hydrocarbon swelling in alldirections. All tanks include a machined aluminum 3/8" withdrawal fitting that swivels 360 for ease ofinstallation. Tanks are for gasoline or diesel. For diesel installations, order Sending Unit with Return Port,Model 8843559). These tanks are not UV protected and are for below-deck installation only.Key featuresRoto-molded, cross-linked polyethylene plastic is impervious to corrosion and ethanol-enhanced fuelEthanol and biodiesel compliant and corrosion resistantComply with ABYC, NMMA and U.S. Coast Guard regulationsFittings are designed for maximum flow during refuelingAluminum 3/8" withdrawal fitting swivels 360 for ease of installationCan be used for gasoline or dieselInclude aluminum fill, vent and withdrawal fittingsInclude fuel gauge sending unit (For diesel installations, order Sending Unit with Return Port, Model 8843559)InstallationFor installation, see the Moeller Marine Fuel Tank Data sheet.