Thirty-two gallons sits in the gap most builds actually need - more than a weekend tank, less than a locker-eating cruiser tank - and the B258 fills it with a bare marine molding shipped entirely without fittings. At 33 lb the blank is easy to trial-fit while you finalize where the plumbing wants to enter and leave.
Ronco's system puts that decision where it belongs. Print the drawing below, mark fill, vent, and pickup on the shape where your installation needs them, and use the on-page fitting planner to spec spin-weld or threaded fittings; the tank arrives with them installed to your marks. In fresh water service the food-grade polyethylene is potable-appropriate, and the B-series dual-role design means the identical blank can instead be ordered fitted as a mid-size gray or black holding tank.
Full, it carries about 267 lb - an eighth of a ton that should sit on a flat supported base, low and strapped. Molded in Tustin, California, where Ronco has worked since 1974. Bracket the capacity from either side in our boat tank category, or see the maker's complete range on the Ronco Plastics hub. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B258 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.
