Ronco Plastics 100H - 10 Gallon Plastic RV Holding Tank

The 100H is the tank you buy when the holding tank that died was an odd one. Ten gallons is the working size for pop-ups, truck campers, and small travel trailers, and Ronco Plastics molds a whole family of 10 to 12 gallon holding tanks precisely because no two coach builders ever put the same box in the same hole. This particular molding is one of the compact rectangular shapes in that family; its siblings run from the 59H at 28 x 14.5 x 11 inches to the low flat 34H at 36 x 13 x 6, and stepping up a size, the 41H side-dump. Measure the cavity you have, then pick the shape that drops in.

Like every Ronco holding tank it is rotationally molded polyethylene from their Tustin, California plant, a shop that has been making RV and marine tanks since 1974. It is a waste tank for gray or black water service, so the wall is built for sanitation duty rather than potable claims, and the molding ships as a sealed blank at about 14 pounds. That blank is the point: Ronco installs spin-weld or threaded fittings where your plumbing actually is, not where a generic tank assumes it should be. Inlet high on the left, dump on the right, vent in the corner the old tank used, all of it is specified at order time.

Print the technical drawing linked below the description, mark your inlet, outlet, and vent locations on it, and that becomes the build sheet for your tank. If the 100H footprint is not the match, the full RV holding tank family and the rest of the Ronco line are on the site with drawings on every page. OneSource Plastics is an authorized Ronco Plastics dealer.

Technical drawing: download the Ronco Plastics 100H 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.