The Ronco Plastics B370 gives you 45 gallons in a 47.5 x 17.38 x 14.25 inch rectangle, one of the workhorse mid-size formats in the B-series marine range. Dual-role by design: with potable fittings it is a fresh water tank in food-grade polyethylene, with waste fittings the identical shell serves gray or black holding duty. Nothing about the molding changes; only the plumbing does.
Do the weight math before you pick a mounting spot. Water runs 8.34 lb per gallon, so a full B370 is roughly 375 lb sitting on your stringers or floor frame. Empty, the tank ships at 92 lb.
Fittings never come pre-drilled here. Each tank is finished per order, with spin-weld or threaded fittings placed to your marks. Print the drawing below, lay out where hoses actually reach in your installation, and lock the spec in with the fitting planner on this page. Ronco has run this custom-fit workflow in Tustin, California since 1974.
More options under boat tanks and RV holding tanks. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B370 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.
