The B253 is Ronco's other 20 gallon marine blank - same capacity as its stablemates, its own distinct molding, shipped with no fittings so the tank finishes to your boat rather than to a catalog assumption. Twenty gallons covers a weekend crew's fresh water honestly: galley, washup, and a cockpit shower without a locker-consuming footprint.
Blank means you drive the layout. Print the drawing below to see the true shape, mark fill, vent, and supply where your plumbing actually runs, and use the on-page fitting planner to spec spin-weld or threaded fittings; Ronco installs them to your marks before the tank ships. Fresh-fitted, the natural food-grade polyethylene is right for potable service - and as a B-series dual-role molding, the same blank can instead be fitted out for gray or black holding.
It ships at 25 lb and weighs about 167 lb full, so give it a supported base and a strap rather than relying on flanges. Molded in Tustin, California by the shop that has done this since 1974. Set it beside the alternatives in our boat tank category, or browse maker-wide on the Ronco Plastics hub. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B253 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.
