The B534 packs 14 gallons into a chunk roughly 16 inches long by 15.75 wide by 14 tall - nearly a cube, and one of the most space-efficient small moldings Ronco makes. Where the shallow B-series tanks chase area, this one chases a single compact hole: a cockpit locker, a corner of a van conversion, the void under a companionway step.
It is a dual-role marine blank. Fresh water buyers get FDA-approved potable polyethylene with supply fittings where they mark them; holding-tank buyers get the same molding with waste fittings. Ronco installs the hardware per order - spin-welded or threaded, at your locations - so the decision happens on paper before the tank is made. Print the drawing below, mark it, and confirm the port layout in the fitting planner on this page.
At 17 lb empty and about 117 lb full, it asks little of the structure under it; the near-cubic shape keeps walls short-spanned and stiff, so there is no flat panel to drum or flex. Molded in Tustin, California by a shop that has held the same trade since 1974.
Size up or down within the boat tank category, cross-shop the land versions under RV water tanks, or see everything on the Ronco Plastics hub. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B534 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.
