The Ronco Plastics B375 is nearly a cube: 11 gallons in a 17 x 16 x 11 inch block that drops into a locker corner, a vanity base, or the dead space beside a wheel well. B-series means dual-role; the food-grade polyethylene shell serves as a potable fresh water tank or as a gray or black waste holding tank depending on the fittings installed, which makes it a favorite for both boats and small RV conversions.
Full, it holds about 92 lb of water at 8.34 lb per gallon. Empty, it ships at just 15 lb, light enough to test-fit one-handed while you sort out the compartment.
Mark your own fitting locations: print the drawing below, decide where fill, vent, and outlet should land, and the factory spin-welds or threads them per order. The fitting planner on this page walks you through it. Ronco has molded and custom-fitted tanks in Tustin, California since 1974.
Compare RV water tanks, RV holding tanks, and other marine tanks. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B375 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.
