An S-shaped tank exists because the floor of a coach is not an empty rectangle. Frame members, axles, and plumbing chases carve the underfloor into odd channels, and the 80H is molded to snake through one: 68 gallons of waste capacity wrapped around obstructions that would force a straight tank down to half the volume. It is one of the largest holding tanks in Ronco's RV line, aimed at full-time rigs and bus conversions where dump-station intervals matter more than anything.
Respect the mass. Full, 68 gallons of waste water comes to roughly 567 lb - more than a quarter ton moving with the vehicle - and the blank itself weighs 124 lb, a genuinely thick-walled molding. Support the tank across its whole footprint and strap it to structure; an S-shape concentrates load at its bends.
Like every Ronco molding since 1974, it leaves the Tustin, California plant with fittings installed to your order - spin-welded or threaded, wherever your dump valve and vent need to land. Print the drawing below and mark the spots, or place them on the on-page fitting planner. If your floor is more conventional, the straight-bodied 92H at 48 gallons and 96H at 44 gallons are simpler installs, and the full range of shapes is in the RV holding tank category. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics 80H 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.
