The Ronco Plastics B388 is a 15 gallon shallow rectangle, 24 x 18.5 x 8.5 inches, sized for van conversions, small cuddy cabins, and utility installs where the tank hides under a seat or floor panel. It is a B-series dual-role molding, so one part number covers both plumbing plans: potable fittings for a food-grade fresh water tank, waste fittings for a compact gray or black holding tank.
At 19 lb empty it is trivial to handle, and even full it totals only about 125 lb at 8.34 lb per gallon, light enough for van floors and light framing.
The factory installs fittings per order, spin-welded or threaded to the positions you mark. Print the drawing below, mark fill, vent, and drain where your build needs them, and use the fitting planner on this page to send the layout. Ronco has done exactly this in Tustin, California since 1974.
Related small tanks under RV water tanks, RV holding tanks, and boat tanks. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B388 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.
