Smallest is sometimes exactly right. The Ronco Plastics B303 is a 5-gallon marine fresh water tank for the jobs that do not need more: a washdown supply on a center console, a galley tank in a micro-camper, a dedicated drinking water reserve beside a bigger system. It ships at 11 lb, holds about 42 lb of water when full, and mounts nearly anywhere a bracket can go.
Small does not mean generic. Like every Ronco molding, the B303 arrives as a sealed blank and gets its spin-weld or threaded fittings installed per order at the exact spots you mark - which matters most on small tanks, where a stray port location can double the hose run in a cramped console. Print the drawing below, note where the fill and outlet truly need to sit, and confirm with the on-page fitting planner. FDA-grade polyethylene keeps even this little supply properly potable.
Ronco Plastics has molded tanks of every size in Tustin, California since 1974, and the B303 proves the small end gets the same care as the big. Step through our boat tanks for the next sizes up, or browse the whole Ronco Plastics range to see how far the family stretches. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B303 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.
