The Ronco Plastics B161 runs 28 gallons through a 35.5 x 15 x 13 inch envelope - long and narrow, the proportions of the space alongside a keelson or beneath a side deck. It is molded in Ronco's marine water / waste series, so the shell is duty-agnostic until you order: potable fittings deliver a fresh water tank in FDA-compliant polyethylene; waste fittings deliver a 28 gallon gray or black holding tank. The geometry serves both equally well.
Because Ronco installs fittings per order - spin-welded or threaded, at your marks - a long tank like this can be plumbed intelligently: pickup or outlet at the end that sits low under real trim, vent at the opposite high end, fill wherever the hose reaches. Print the dimensioned drawing below, pencil the ports in place, and confirm through the fitting planner on this page.
It ships at 28 lb; full of water it is about 234 lb spread along that 35.5 inch run, which distributes kindly but still wants support under the full length. Tustin, California molding, a lineage running since 1974. Adjacent shapes are gathered at boat tanks, holding-duty context at RV holding tanks, the whole family at the Ronco Plastics hub, and shipping quotes at the freight estimator. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B161 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.
