The Ronco Plastics B411 is the flagship of this stretch of the B-series: 150 gallons in a single heavy molding that ships at 180 lb. This is passagemaker and crew-boat capacity, the fresh water bank for vessels that measure range in days offshore. And because it is a B-series dual-role shell, the same molding fitted for waste becomes an exceptionally large holding tank; potable fittings keep it a food-grade drinking water tank.
Treat the numbers with respect: 150 gallons of water weighs about 1251 lb at 8.34 lb per gallon. At this scale the tank is structure, planned into the hull or chassis with full-length support and proper restraint.
Every fitting is installed per order, spin-welded or threaded to the marks you provide. Print the drawing below, plot fill, vent, pickup, and drain against your build drawings, and use the fitting planner on this page to lock the spec. Ronco has custom-built tanks in Tustin, California since 1974.
Browse more large boat tanks, the full Ronco Plastics catalog, and the freight estimator. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B411 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.
