Eight gallons, 18 x 11.5 x 10 inches, 12 lb on the scale - the Ronco Plastics B186 is the smallest kind of serious: a real molded tank for spaces where most builders would give up and strap in a jug. As part of Ronco's marine water / waste series, even this smallest shell keeps the dual identity: ordered with potable fittings it is a fresh water tank in FDA-compliant polyethylene for a dinghy, skiff, or teardrop camper; ordered with waste fittings it is an 8 gallon gray or black holding tank that makes a tiny boat legal and self-contained.
Small does not mean generic. The B186 gets its fittings installed per order - spin-welded or threaded, at your marks - and at this scale placement is everything: in a shell 10 inches tall, a port an inch off the low point strands a meaningful share of the capacity. Print the dimensioned drawing below, mark it against the actual mounting attitude, and set the layout with the fitting planner on this page.
Full of water the B186 carries about 67 lb - respectable mass from a 12 lb part, and reason enough for a proper strap even in the smallest hull. Molded in Tustin, California since 1974. When the vessel grows, the boat tanks range scales with it; the Ronco Plastics hub shows everything, and RV holding tanks covers the waste side. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B186 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.
