Moeller Marine 20 Gallon Water Tank, Polyethylene, Model 040220

The Moeller Marine 20 Gallon Water Tank (040220) is a polyethylene freshwater tank built for onboard water storage on boats and RVs. Molded from resin that meets FDA specifications for polymers used in contact with food, the tank keeps stored water safe, odor-free, and free of plastic taste transfer. It satisfies U.S. Coast Guard standards for onboard water storage and is designed to hold up to the marine environment without degrading water quality over time.

The tank provides standard NPT openings for vent, fill, and drain connections, making it straightforward to plumb into an existing freshwater system using common marine fittings. Its polyethylene construction resists corrosion, cracking, and the freshwater/vapor exposure typical of below-deck installations, and the material will not leach taste or odor into the water it holds. With a 20 gallon (76 liter) capacity, it suits boats needing a mid-size dedicated freshwater reservoir.

Moeller offers this tank across a range of sizes, and the 040220 is the 20 gallon version, sized 21.00 x 17.00 x 14.00 x 8.50 inches (533 x 432 x 356 x 216 mm). It is intended as a direct-fit replacement or new installation for boaters upgrading or repairing their freshwater storage system.

Specifications

• Brand: Moeller Marine
• Manufacturer Part Number: 040220
• Capacity: 20 gallons (76 liters)
• Tank Dimensions: 21.00 x 17.00 x 14.00 x 8.50 inches (533 x 432 x 356 x 216 mm)
• Weight: 15.13 pounds
• Material: Polyethylene (PE), Resin
• Openings: Standard NPT openings for vent, fill, and drain
• Compliance: Meets FDA specifications for polymers in contact with food; satisfies U.S. Coast Guard standards
• UPC: 739729402207

Fitment

Universal freshwater tank; not vehicle- or engine-specific. Confirm available mounting space matches the 21.00 x 17.00 x 14.00 x 8.50 inch (533 x 432 x 356 x 216 mm) footprint before installing.

Frequently Asked Questions

What is the capacity of the Moeller 040220 water tank? The Moeller Marine 040220 water tank holds 20 gallons (76 liters) of freshwater.

What are the dimensions of the 040220 water tank? The 040220 measures 21.00 x 17.00 x 14.00 x 8.50 inches (533 x 432 x 356 x 216 mm).

How much does the 040220 water tank weigh? This tank weighs 15.13 pounds empty.

What material is the Moeller 040220 tank made of? It is molded from polyethylene (PE) resin, the same family of plastic used across Moeller's water and waste tank line.

Is this tank safe for drinking water? Yes, the 040220 is made from resin that meets FDA specifications for polymers in contact with food, so it will not filter taste or emit odors into stored water.

Does the 040220 meet Coast Guard requirements? The tank satisfies U.S. Coast Guard standards for onboard water storage.

What connections does the 040220 water tank have? It provides standard NPT openings for vent, fill, and drain, so it accepts common marine plumbing fittings.

Will this tank leach taste or odor into my water over time? No, the polyethylene construction of the 040220 will not filter taste into water or emit odors.

Can I use the 040220 as a replacement for my boat's existing water tank? Yes, as long as the mounting space matches its 21.00 x 17.00 x 14.00 x 8.50 inch (533 x 432 x 356 x 216 mm) footprint, the 040220 can replace an existing 20 gallon freshwater tank.

Does Moeller make this tank in other sizes? Yes, the 040220 is the 20 gallon version in Moeller's tank lineup, which spans a range of gallon capacities in the same product family.

Is the Moeller 040220 tank corrosion resistant? Yes, because it is molded from polyethylene rather than metal, the 040220 is not subject to the corrosion that affects metal water tanks.