The B366 rounds out the B-series small-tank bench with 18 gallons in a 22 x 17 x 12 inch molding - compact in plan, moderate in height, the proportions of a tank that was designed to fit real lockers rather than win a spec-sheet argument. Eighteen gallons covers a couple's weekend afloat or a van's full fresh system, and this shape delivers it without demanding the long, uninterrupted runs that low-profile tanks need.
It is a dual-role blank in the plainest sense: the molding is finished as a fresh water tank or a waste holding tank depending on the fittings you order. Fresh side, it is FDA-compliant polyethylene, safe for potable supply. Waste side, the same shell takes gray or black water beside a head or under a shower pan. Ronco spin-welds or thread-installs every port to the marks you set - print the drawing below, place your fittings with the on-page planner, and the tank leaves Tustin, California built to your sheet, the way the plant has worked since 1974.
It ships at 20 lb and weighs about 150 lb full, so land it flat and strap it to structure. Compare the other 18-gallon forms and neighbors across boat tanks, the trailer-side range in RV water tanks and RV holding tanks, and the maker's entire line on the Ronco Plastics hub. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B366 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.
