The Ronco Plastics B291 is a 20-gallon marine fresh water tank in a compact, deep-bodied format that stands in a cockpit locker rather than sprawling under a floor. Boxy, tall-sided tanks like this are the easiest kind to retrofit: they pass through hatch openings, sit flat against a bulkhead, and leave their top surface accessible for the fill and vent. The molding weighs 24 lb; brim it with water and the structure below is holding about 167 lb.
Every B291 leaves the mold sealed and blank, because Ronco installs fittings per order - spin-welded or threaded, each one placed to the marks you provide. Take advantage of it: put the outlet at the true low corner for your installation angle, keep the vent high and inboard, and let the fill land under the deck plate instead of six inches away from it. Print the drawing below and confirm your layout with the on-page fitting planner; the FDA-grade polyethylene takes care of keeping the water potable.
Ronco Plastics has molded marine tanks in Tustin, California since 1974, and the B291's format is one of their most-installed. See the rest of our boat tanks for longer and lower variations on the same 20-gallon idea, or step up through the Ronco Plastics range as your plumbing plans grow. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B291 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.
