The B365 packs 10 gallons into 17.75 x 12.5 x 11 inches - the most compact footprint at this capacity in the B-series. Where its low-profile sibling spreads the same gallons into a wide sheet for underfloor bays, this molding gathers them into a tidy block for lockers, console interiors, and bench voids. Under eighteen inches in every direction, it is the 10-gallon tank for spaces measured with a stubby tape.
Dual-role, as the series demands: fresh water fittings make it an FDA-compliant potable molding for a day boat or camper galley; waste fittings make the identical shell a compact gray or black holding tank. The role is fixed at first fill - waste never converts back to fresh - so choose deliberately. Ronco installs your ports to your marks before shipping from Tustin, California, where they have molded to customer drawings since 1974. Print the drawing below, work the on-page fitting planner, and the tank arrives ready for hose.
Thirteen pounds empty, about 83 lb full: light to install, serious to restrain. If the block form is wrong for your space, the flat 10-gallon shapes and every neighboring size live in boat tanks and RV water tanks, with waste-dedicated moldings under RV holding tanks and the complete catalog on the Ronco Plastics hub. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B365 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.
