Marine Tanks

Marine tanks are onboard storage tanks for boats, sailboats, yachts, trawlers, and vessels. There are two types of boat tanks: fresh water tanks for storing potable water and holding tanks for collecting and storing of grey water or black water. National Tank Outlet’s marine tanks are manufactured from high-quality polyethylene resin that is BPA free, FDA-approved for potable water, and ANSI NSF 61 compliant.

Plastic marine tanks are made by manufacturers Ronco and Dura-Cast. The tanks are rotationally-molded with polyethylene resin to offer superior durability, service life, and resistance against cracking, rusting, and corrosion.

Marine tanks are most-commonly rectangular in shape. Custom-molded options are available for specific boat makes and models. Poly marine tanks are available in numerous capacities, dimensions, and wall thicknesses to guarantee the tank works for the specific application. These tanks can be used as new or replacement marine tanks. Tanks are available with pre-installed fittings and lids or as a blank tank with custom DIY fitting packages.

Browse our manufacturer specific Ronco Marine Tanks and Dura-Cast Marine Tanks.

Some common boat brands these tanks will fit include but are not limited to:

ArrowCat Bayliner Beneteau Bertram Boston Whaler Bluewater Campion Catalina Yachts Cobalt Boats Contender Boats Cruiser Yachts Cutwater Boats Everglades Boats

Formula Boats Glastron Grady-White Boats Hydra Sports Invincible Boats Jeanneau Lagoon Larson Boats Leopard Catamarans Marlow-Hunter Marlow-Mainship Mikelson Yachts

Monaro Nordic Tugs Rampage Sport Ranger Tugs Regal Boats Regulator Marine Rinker Boats Sabre Yachts Sea Ray Boats Scout Boats Stingray Boats Striper Boats Tiara Yachts