The Ronco Plastics B372 is a 37 gallon B-series marine molding, an odd-number capacity that exists because a particular hull needed exactly this shell. That is the point of the B-series: dozens of shapes so you match the space you have instead of rebuilding around a generic tank. It is dual-role like its siblings; potable fittings make it a food-grade fresh water tank, waste fittings make it a gray or black holding tank.
The molding ships at 86 lb, and a full water load adds about 309 lb at 8.34 lb per gallon, so plan support underneath accordingly.
Fitting placement is yours to call. Print the drawing below, mark where each fitting should sit, and the factory installs them per order, spin-welded or threaded to spec. The fitting planner on this page keeps the request organized. This is how Ronco has built tanks in Tustin, California since 1974: one shell, finished for one customer.
Related listings under boat tanks and the wider Ronco Plastics range. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B372 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.
