The B200 is a crossover in the truest sense: a 20 gallon molding at 24 x 17 x 12 inches that Ronco lists for marine and RV service, as water or as waste, with the role fixed only when the fittings go on. One shell, four legitimate lives - fresh water under a v-berth, gray water under a galley, potable supply in a camper conversion, black water under a coach floor. The fitting order is the fork in the road, and the tank is never plumbed for you; it arrives ready for the system you build.
Run it fresh and you are working with FDA-compliant polyethylene rated for potable water. Run it as a holding tank and the same seamless rotomolded shell shrugs off waste chemistry season after season. Either way the 24 x 17 x 12 inch envelope is the part to verify first - it is a compact rectangle that slides into bench seats, wheel-well voids, and underbunk bays that taller tanks cannot enter.
At 22 lb empty it is a one-hand carry; full it holds about 167 lb at 8.34 lb per gallon, so strap it to frame or stringer, not paneling. Print the drawing below and mark your fill, vent, and pickup - or dump and rinse, if this one is bound for waste duty - and the Tustin, California shop spin-welds or thread-installs each fitting to your marks, as it has since 1974. The on-page fitting planner takes clicks instead of pencil marks.
Boat-bound? Start with the boat tank category. Coach-bound? See RV water tanks and RV holding tanks, or browse the whole catalog on the Ronco Plastics hub. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B200 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.
