Ten gallons, 26 x 11 x 11 inches, 16 lb out of the box: the B438 is tankage for the smallest installations that still deserve real plumbing. Camper vans, dinghies with center consoles, truck campers, tiny cabins - anywhere a jerry can is currently pretending to be a water system, this molding replaces it with a fixed, fitted, vented tank.
Small does not mean simplified. The B438 is the same dual-role B-series shell as its big siblings: potable fittings turn it into a fresh water tank, waste fittings turn it into a gray/black holding tank, and Ronco installs either set to your marks - spin-welded or threaded. Print the drawing below, mark your fitting spots, and the on-page fitting planner will size them for small-bore plumbing.
Full, it carries about 83 lb of water. Molded in Tustin, California by Ronco, as everything in the line has been since 1974. If ten gallons is not quite right, the RV water tank category and boat tank category step through the small sizes, and the holding tank category covers dedicated waste shapes. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B438 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.