The Ronco Plastics B146 is a 20 gallon marine fresh water tank that ships at 28 lb, and that ratio is its argument: meaningful water capacity in a molding light enough to hand down a companionway alone. Twenty gallons covers a weekend afloat for a small crew, and in FDA-compliant polyethylene it does so without the metallic taste or the slow rust-through that sends so many original-equipment tanks to the scrap pile.
Ronco has molded tanks in Tustin, California since 1974, and the ordering pattern has not changed: the shell is standard, the fittings are yours. Spin-welded or threaded ports go in per order at the locations you mark. Print the drawing below, draw your fill, vent, and supply where the boat needs them, and use the fitting planner on this page to finalize sizes and spots before checkout.
Once plumbed and topped off, the B146 holds about 167 lb of water - budget the platform for that, not for the 28 lb you carried aboard. If the outline is close but not right, the boat tanks page has the neighboring shapes, and the Ronco Plastics hub maps the entire line. Get a ZIP-level shipping number from the freight estimator. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B146 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.
