Some spaces are all footprint and no height, and that is precisely where the Ronco Plastics B285 earns its keep: 6 gallons in a molding only 5.38" tall, spread across a 21.62" x 14.38" pan. Under a cockpit sole, beneath a bunk platform, in the dead space under an RV dinette seat - places where no conventional tank fits at all, this one disappears. It ships at 12 lb and holds about 50 lb of water when full, light enough for plywood shelf mounting.
It is also a true dual-purpose molding. Ordered with fresh water fittings, the FDA-grade polyethylene makes it a legitimate small potable tank; ordered for holding duty, it becomes a compact gray or black waste tank for a small boat head or a camper sink. Ronco sets each spin-weld or threaded fitting to your marks, and on a tank this shallow, fitting placement is everything - print the drawing below and use the on-page fitting planner to make sure your outlet lands at the low corner of your actual installation.
Ronco Plastics has molded low-profile specials like this in Tustin, California since 1974, and the depth of that catalog shows in exactly these odd sizes. If you have an inch or two more headroom to work with, the boat tanks range opens up quickly, and the RV holding tanks shelf covers the waste side in more capacities. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B285 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.
