The BOAT9W is the practical cruiser's tank: 44 gallons at 48 x 20 x 12 inches, a four-foot molding that fits athwart a V-berth locker or along an engine room bulkhead and carries enough fresh water for a genuine week aboard. It sits one step below the family's largest tank in capacity while staying a full foot shorter - often exactly the compromise a real hull demands.
The heavy-duty wall brings the blank to 77 lb, dense enough that you should plan the carry path into the boat before delivery day. Full, add about 367 lb of contents; frame the bed, support the whole bottom, and keep the mass low. The material is FDA-compliant potable polyethylene - fresh water service only.
Every penetration is installed per order at the Tustin, California plant, spin-welded or threaded to your marks, Ronco's standing method since 1974. Print the drawing below, mark fill, vent, and pickup, and finish the job in the on-page fitting planner.
Cross-shop the light-duty 43-gallon RV12W if the installation is a coach rather than a hull; the marine range is under boat tanks and the catalog on the Ronco Plastics hub. OneSource Plastics is an authorized Ronco Plastics dealer.