Eighty gallons is the capacity where an RV stops counting shower minutes, and the B260 delivers it in a 44.62 x 22 x 20.5 inch molding proportioned for a standard basement bay - long enough to use the bay, not so long it needs two. For full-timers and long-boondock rigs this is the workhorse size: real autonomy without the structural gymnastics the largest tanks demand.
Not that the numbers are casual. The molding ships at 108 lb, and a full load is about 667 lb - a third of a ton that belongs over frame structure with continuous support under the full base and strapping rated for a hard stop. Fill it after it is mounted, never before.
As a B-series dual-role blank it takes either job: potable fresh in food-grade polyethylene when fresh-fitted, or high-capacity gray/black holding when waste-fitted. It arrives unplumbed - print the drawing below, mark your fitting locations, and use the on-page fitting planner to spec the spin-weld or threaded fittings Ronco installs to your marks, in Tustin, California, as since 1974. Neighboring sizes are in RV water tanks and RV holding tanks; everything else is on the Ronco Plastics hub. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B260 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.
