Narrow spaces get their own tank: the Ronco Plastics B312 runs 72" x 15" x 13", a six-foot rail of a molding that carries 53 gallons along a keel line, a chassis frame run, or the slot behind a rear seat. It is dual-purpose - fresh water or gray or black waste, fixed by the fittings you order - so the same molding solves either the supply side or the holding side of a marine or RV plumbing plan. Ship weight is 103 lb; a full load of water is about 442 lb, strung out low along the structure.
Ronco installs each spin-weld or threaded fitting per order at your marks, and a tank six feet long makes that flexibility count double. The outlet must sit at the true low end of the installed run; the vent belongs at the opposite high end; and a mid-length fill can save you a long hose. Print the drawing below, mark it against the tank's real pitch in your installation, and finalize with the on-page fitting planner. Fresh water builds ride on FDA-grade polyethylene, fully potable.
Ronco Plastics has molded these long-and-narrow formats in Tustin, California since 1974. Compare the family on our boat tanks shelf, cross to RV holding tanks for the waste-side siblings, and price shipping through the freight cost estimator. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B312 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.
