A 26 inch cube. The B434 holds 69 gallons in a shape with the smallest possible footprint for its volume - 26 x 26 x 26 inches of tank that drops into a square bay, a cockpit locker, or the corner of an engine room and wastes almost nothing to geometry. Cubes also handle partial loads gracefully: less free surface than a wide flat tank, so less weight shift underway.
Fresh water or waste holding is decided at order time. The B434 is a dual-role B-series shell: potable fittings make it a water tank, sanitation fittings make it a gray/black holding tank, and Ronco installs whichever set you choose to your marked positions - spin-welded or threaded. Print the drawing below, mark all faces you want fittings on, and let the on-page fitting planner confirm the sizes.
At 49 lb bare it moves easily; full it carries about 575 lb of water concentrated on a small base, so the platform under it should be the strongest thing in the bay. Rotomolded in Tustin, California by Ronco, in the tank business since 1974. Compare formats in the boat tank lineup or from the Ronco Plastics hub. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B434 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.
