Nine gallons is the honest small end of marine tankage, and the B442 makes it usable: a 19 x 15 x 9 inch molding that fits day boats, cuddy cabins, and camp trailers where the water system is a sink and a spigot. Nine inches tall, it slides under consoles and seats that taller tanks bounce off.
Even the smallest B-series shell is dual-role. With potable fittings the B442 is a fresh water tank; with waste fittings it is a compact gray water catch for that same sink. Ronco installs the fittings per order at the positions you mark - spin-welded or thread-mounted - so print the drawing below, mark inlet, outlet, and vent, and let the on-page fitting planner size them for small plumbing.
The blank weighs 14 lb; full it carries about 75 lb of water. Like every Ronco molding it comes out of Tustin, California, where the company has rotomolded tanks since 1974. Nearby sizes are in the boat tank category, dedicated waste shapes in the holding tank category, and the full catalog on the Ronco Plastics hub. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B442 dimensional drawing - print it to plan your install and mark exactly where you want fittings located; Ronco installs spin-weld or threaded fittings to your marked spec.
