Eight inches tall, 50 inches long. The 50W is the first of Ronco's plank series - three moldings sharing the same 16 inch width and 8 inch height, growing only in length. This one holds 23 gallons, and its whole design brief is to vanish: under a sole, beneath a floor, along a frame rail, in the shallow nothing between a bed base and the steel below it.
It is a Water / Waste Holding Tank series shell, so the plank works either side of the plumbing. Fresh-water fittings make it a potable tank in FDA-compliant polyethylene; waste fittings make it a slimline gray tank that can sit directly under the shower pan feeding it - the shortest drain run there is.
Seventeen pounds empty, about 192 lb full at 8.34 lb per gallon of water, spread across more than four feet - support it along the run, not at two points. Its longer siblings carry more in the same section; find them and every other profile in the RV water tanks category, the RV holding tanks, and the boat tanks range.
Rotomolded in Tustin, California since 1974. Fittings are installed per order - spin-weld or threaded, at your marks: print the drawing below or click them into position on the fitting planner. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics 50W 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.