Some tanks fight the bay; the B437 is shaped for the bay most boats and coaches actually have. At 36 x 18 x 12 inches its 28 gallons ride in the classic double-square proportion - twice as long as wide, a foot tall - that fits under settees, beneath cockpit soles, and across RV storage compartments without drama. When you measure your space and it is roughly this, stop looking.
The molding is dual-role, as all Ronco B-series shells are: potable fittings make it a marine or RV fresh water tank, sanitation fittings make it a gray/black holding tank. Ronco installs your chosen set per order, spin-welded or threaded at your marks. Print the drawing below, mark where each fitting should land, and confirm sizes with the on-page fitting planner.
The blank ships at 31 lb - a one-person carry - and holds about 234 lb of water when full. Rotomolded in Tustin, California by Ronco, tanks since 1974. Neighboring shapes live in the boat tank range and the RV water tank range. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B437 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.
