The 29H is the proportionate one: 16 gallons at 36 x 22 x 9.25 inches, a footprint close to a standard underfloor bay in mid-size travel trailers. No extreme dimension, no clever geometry - just a rectangle that fits where tank bays actually are, which is why this format outsells the exotic shapes.
Under load it behaves predictably too. About 133 lb of waste water at full spreads across a 36 x 22 inch bottom panel, and the 22 lb blank has the wall thickness to take that without a full cradle - perimeter support plus a center bearer is typically enough.
Nearby alternatives: the 7H offers 16 gallons in another compact body, and one class up the 16H holds 19 gallons at 35 x 22.5 x 12.25 inches - nearly the same footprint as this tank, three gallons more, three inches deeper. That comparison alone decides many builds. The full lineup is in the RV holding tanks category.
Gray or black water service only; no potable use. Ronco rotomolds the 29H in Tustin, California, as it has since 1974, and installs your fittings to order - print the drawing below, mark your fitting locations, and choose spin-weld or threaded. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics 29H 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.
Freight
LTL freight is quoted to your ZIP with the freight cost estimator or by phone at 866-418-1777. The listed price is before freight.
Ready to order?
Add it to your cart at the top of this page, get LTL freight to your ZIP, request a written quote, or call 866-418-1777. The listed price is before freight.
