The Ronco Plastics B409 runs five feet long and seven inches tall: a 60 x 22 x 7 inch molding holding 33 gallons in space most builders treat as dead. Slide it under a floor or berth and reclaim real capacity without giving up an inch of living area. The B-series dual-role shell takes potable fittings for food-grade fresh water service or waste fittings for low-profile gray or black holding duty.
It is a heavy molding for its class at 93 lb, the wall mass a long shallow shell needs to stay flat. Full, it adds about 275 lb of water at 8.34 lb per gallon along its length.
Long, shallow tanks drain only as well as their fitting layout, so mark yours with care. Print the drawing below, plot the low point and pickup, and the factory installs fittings per order, spin-welded or threaded to your marks; the fitting planner on this page structures the spec. Ronco has molded to order in Tustin, California since 1974.
More shallow formats under boat tanks and RV holding tanks. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B409 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.
