Six inches. That is the whole vertical story of the B235, and it is the reason this tank exists: 18 gallons spread across a 40.75 x 18 x 6 inch pancake that slides under a berth, a cockpit sole, or an RV floor where no conventional tank will go. Spreading water that thin takes a heavy molding to keep the broad top and bottom faces from oil-canning, which is why this blank ships at a stout 76 lb.
Like every tank in Ronco's B-series, the B235 is molded as a dual-role blank. Order it with fittings placed for supply and it serves as a fresh water tank in food-grade polyethylene; order it with waste-style inlets and a dump outlet and the same molding runs gray or black service. You decide its life when you mark the drawing - print the one below, mark your fitting locations, and use the on-page fitting planner to spec spin-weld or threaded fittings. Ronco installs them to your marks before it ships.
Full of fresh water the B235 carries about 150 lb, spread across nearly the whole footprint - a load most soles and floors take easily precisely because it is so distributed. Ronco has rotomolded these in Tustin, California since 1974. See the rest of the marine range in our boat tank category, the coach-side shapes in RV water tanks, and everything this maker molds on the Ronco Plastics hub. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B235 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.
