The Ronco Plastics B163 is 25 gallons kept deliberately low: 30 x 20 x 10 inches, a footprint that slips under bunks, cockpit soles, and camper floors where every vertical inch is contested. It comes out of Ronco's marine water / waste series, so the shell has no fixed career - order it with potable fittings and it is a fresh water tank in FDA-compliant polyethylene; order it with waste fittings and it becomes a 25 gallon gray or black holding tank riding at the lowest point of the vehicle, which is where holding tanks belong anyway.
A tank only 10 inches tall demands precise ports, and that is Ronco's specialty: fittings installed per order, spin-welded or threaded, exactly where you mark. Put the outlet at the genuine low corner of your installation and the vent at the high one, and this shallow tank fills fully and drains dry. Print the drawing below, mark it against the actual pitch of your floor, and finalize in the fitting planner on this page.
It ships at 26 lb; full, it carries about 208 lb of water spread across that wide, flat base - easy on structure if the support is continuous. Molded in Tustin, California by a shop doing this since 1974. Cousins in every proportion are under boat tanks and RV water tanks; the map of the whole line is the Ronco Plastics hub. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B163 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.
