Ronco Plastics 8H - 22 Gallon Plastic RV Holding Tank with End Dump and Rails

Two features separate the 8H from the plain boxes in Ronco's 22 gallon class, and both are about installation. The end dump puts the waste valve at the end of the tank, where slide-out dump hardware and rear-bath floor plans want it. The rails are molded-in mounting flanges that take straps or brackets directly, so the tank hangs from its own structure instead of relying on a cradle you have to fabricate. If your old tank had tabs along its edges, this is that pattern.

Underneath the features it is a standard 22 gallon gray or black water tank, about 24 pounds as a blank and roughly 183 pounds full at 8.34 pounds per gallon, with no potable claim. The related shapes worth cross-checking are the 56H end-dump at 22 x 22 x 12 inches, the plain 10H at 34 x 22 x 12, and the long 33H at 83 x 13.5 x 10.

Fittings are installed per order at Ronco's Tustin, California plant, spin-welded or threaded to your marks, the way they have built tanks since 1974. Print the drawing further down the page, note where your inlet, vent, and dump need to land relative to the rails, and submit that as your spec. The whole family is under RV holding tanks. OneSource Plastics is an authorized Ronco Plastics dealer.

Technical drawing: download the Ronco Plastics 8H 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.