Ronco Plastics 39H - 30 Gallon Plastic RV Holding Tank (46.0" x 22.0" x 9.0")

Same 30 gallons, different arithmetic: the 39H spreads its volume across 46 x 22 inches at only 9 inches tall, while its sibling the 22H stacks it deeper at 39 x 25 x 12. Pick by the dimension your compartment is stingiest with. Nine inches of height is the 39H's trump card, clearing low waste bays and underfloor cavities that the taller tank cannot enter, at the cost of seven more inches of length.

Both are pure waste tanks, gray or black water with no potable claim. The 39H blank weighs about 26 pounds; full weight is the figure that matters, roughly 250 pounds at 8.34 pounds per gallon, and a shallow tank spreads that load wide, so support the full footprint rather than two narrow straps.

Rotomolded in Tustin, California by Ronco Plastics, in the tank business since 1974, each one ships with fittings installed per order, spin-welded or threaded exactly where your plumbing needs them; on a 9 inch tall tank, outlet placement is worth double care, so print the drawing below, mark your fitting locations against the old tank, and order to that sheet. If the size itself is wrong, the 23H at 28 gallons sits below and the rest of the range is under RV holding tanks on the Ronco hub. OneSource Plastics is an authorized Ronco Plastics dealer.

Technical drawing: download the Ronco Plastics 39H 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.