Weight tells you a lot about a tank. The Ronco Plastics B371 holds 35 gallons yet ships at 92 lb, which is serious wall thickness for the capacity; this is a molding built to be strapped into a working boat and forgotten. As a B-series shell it is dual-role: specify potable fittings and the food-grade polyethylene carries drinking water, or specify waste fittings and it runs as a gray or black holding tank.
Filled with fresh water it totals about 292 lb at 8.34 lb per gallon, a load that stout wall section handles without oil-canning between supports.
Because fittings are installed per order, the tank arrives plumbed for your boat and nobody else's. Print the drawing below, mark inlet, outlet, and vent where your runs land, and use the fitting planner on this page to spell out sizes and styles; the factory spin-welds or threads them to those marks. Ronco has molded tanks in Tustin, California since 1974.
Explore more marine tanks or the full Ronco Plastics catalog. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B371 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.
