Forty-eight gallons in an 11-inch-tall package: the Ronco Plastics B306 is a broad, low dual-purpose molding - 45.5" x 24.25" x 11" - that carries real capacity in the horizontal spaces boats and coaches have but rarely use. Under a cockpit sole, beneath a platform bed, across a basement bay floor: lay it flat, strap it down, and the payload rides at the bottom of the vehicle where it belongs. Ship weight is 95 lb; a full load of water is about 400 lb.
Whether those gallons are potable or waste is set by the fitting order. As a fresh water tank, the FDA-grade polyethylene keeps the supply drinking-safe; as a gray or black holding tank, the same molding takes the other side of the plumbing diagram. Ronco installs every spin-weld or threaded fitting at the marks you provide, so print the drawing below, plot your fill, discharge and vent against the tank's installed orientation, and confirm the spec with the on-page fitting planner.
Ronco Plastics has molded dual-purpose tanks in Tustin, California since 1974, and the B306's format shows up in refits of both kinds - browse boat tanks for the marine family or RV holding tanks for the coach side. The freight cost estimator prices delivery to your ZIP in seconds. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B306 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.
