At 33.25 x 24.5 x 15 inches and just 40 lb, the Ronco Plastics B507 is the rare 47 gallon tank that one person can carry into place. The mid-height format splits the difference between pancake tanks that sprawl and upright tanks that loom, fitting the ordinary under-bench compartments most boats and coaches actually have.
It is a dual-role B-series molding: fresh water fittings make it a potable supply tank in food-contact polyethylene, waste fittings make it a gray or black holding tank, and nothing about the shell changes between the two. Ronco installs the fittings per order, spin-welded or threaded to the marks you provide, so the tank arrives matched to your hose runs.
Full, it holds about 392 lb of water at 8.34 lb per gallon, a load out of all proportion to its empty weight, which is the argument for through-bolted cleats over screws. Print the dimensioned drawing below, confirm the fit, and place your ports with the on-page fitting planner.
Molded in Tustin, California by Ronco Plastics, since 1974. The dedicated 47 gallon holding tank covers a settled waste role, adjacent sizes fill the marine collection, and the freight cost estimator quotes delivery. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B507 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.
