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. One Source Plastics is an authorized Ronco Plastics dealer.
Fittings
This holding tank ships with its outlet molded in, ready to plumb. Add the Ronco 3-inch uniseal (F3UNISEAL), a loose pipe-to-tank seal you press into the outlet yourself, with no threads or nuts.
Technical drawing: download the Ronco Plastics 29H dimensional drawing - print it to plan your install. The outlet is molded in. Add the Ronco 3-inch uniseal to connect it.
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.
See this tank
Product video. Watch the Ronco Plastics 29H - 16 Gallon Plastic RV Holding Tank (36.0" x 22.0" x 9.25") video (67 seconds) with dimensions, fittings and shipping notes.
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.
