Sixty gallons from a 36.25 x 30.25 inch footprint at 14.5 inches tall - the 54W is how you get a genuinely large water system into a bay that is wide rather than long. Its nearly-square proportions fill a basement compartment or under-bed plenum the way a drawer fills a cabinet, converting an awkward wide void into the biggest single tank many floor plans will ever accept.
It is molded in the Water / Waste Holding Tank series, so the 60 gallons is unassigned until you order. Fresh-water fittings make it a potable tank in FDA-compliant polyethylene - a true extended-boondocking supply. Waste fittings make it a holding tank generous enough to change how you plan a trip.
The blank is a manageable 24 lb; the full tank is about 500 lb of water at 8.34 lb per gallon, and a half-ton concentrated in a three-foot square is a frame-out job - through-bolts, crossmembers, low in the vehicle. Neighboring large formats are in the RV water tanks category and RV holding tanks; the whole line is at the Ronco Plastics hub.
Rotomolded in Tustin, California since 1974. Fittings are installed per order - spin-weld or threaded, at your marked points: print the drawing below or position them on the click-to-place fitting planner. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics 54W 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.