Ten gallons is the most honest capacity in the marine catalog. It is a day tank: rinse water for a dive boat, galley supply for a daysailer, or a compact holding tank that keeps a small boat legal in no-discharge waters. The B217 serves either master - Ronco lists it as water or waste, and the fitting order you place is what decides. The blank shell is never plumbed for you; it becomes fresh supply with a fill, vent, and pickup, or a holding tank with an inlet and dump.
In fresh service the polyethylene is FDA-compliant and potable-rated. In waste service the same seamless rotomolded shell takes gray or black water without ceremony. At 20 lb empty it is the easiest tank in the line to handle - one hand, one person, no help - and even brim-full it carries only about 83 lb at 8.34 lb per gallon, which is why it suits the small craft where every pound is negotiated.
Print the drawing below, mark your penetrations for the role you have chosen, and the Tustin, California shop spin-welds or thread-installs each fitting to your marks - the same per-order practice Ronco has kept since 1974. The on-page fitting planner will take the layout by click if a printer is not handy.
For hulls, browse the boat tank category; for small waste installations on wheels, the RV holding tanks range includes compact shapes like the 7 gallon 9H. The whole catalog lives on the Ronco Plastics hub. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B217 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.
