The 11W is a near-cube: 21 x 13 x 13 inches, 14 gallons. Where most RV tanks chase length to hide under a floor, this one goes the other way - deep and compact, sized for a vertical locker, a bench seat pedestal, or the dead corner of a cargo bay that a long flat tank cannot use. It comes out of Ronco's Water / Waste Holding Tank series, which means the same molding runs either direction: order it with fresh-water fittings and it is a potable tank in FDA-compliant polyethylene, or order it with waste fittings and it becomes a gray or black holding tank.
Empty it weighs 9 lb, so a single person can trial-fit it a dozen times before committing. Full of water it carries about 117 lb (water runs 8.34 lb per gallon), which is the number your mounting strategy actually has to answer to - strap to frame or structure, never to trim.
If the bay wants length instead of depth, browse the RV water tanks category for flatter footprints, or the RV holding tanks if this one is headed for waste duty. The same moldings serve marine installs.
Rotomolded in Tustin, California, where Ronco has built water and holding tanks since 1974. Fittings are installed per order - spin-weld or threaded, placed to your marks: print the drawing below or drop your fittings on the click-to-place planner. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics 11W 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.
