The B250 is nearly square in plan - 23.5 x 23 x 12 inches - which makes it the tank for the bay that is wide and short rather than long and narrow. Twenty-five gallons ride in a footprint under two feet on a side, a foot tall, an easy fit under a berth, in a transom locker, or beneath an RV dinette.
Blank on arrival, decided by you: this B-series dual-role molding becomes a potable fresh tank in food-grade polyethylene or a gray/black holding tank depending on the fittings you order. Print the drawing below, mark your locations on the broad top face - a square tank gives you unusual freedom about where things land - and the on-page fitting planner specs the spin-weld or threaded fittings Ronco installs per order.
At 26 lb empty it is a one-person install; at about 208 lb full it still wants a flat supported base and a strap. Molded in Tustin, California, where Ronco has been rotomolding tanks since 1974. Square has cousins in every proportion - see our boat tank category, RV holding tanks, and the full Ronco Plastics hub. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B250 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.
