Lay a sheet of plywood flat and you have roughly the idea: the 3H spreads 35 gallons across a 64 x 32 inch footprint at just 8 inches tall, the widest, flattest holding tank in this stretch of Ronco's line. It is the shape of a coach floor with a shallow void and no other options, and it holds serious volume there precisely because it refuses to be tall. The blank weighs about 45 pounds, befitting all that surface area.
Duty is gray or black water, never potable, and the full-load engineering deserves attention: 35 gallons at 8.34 pounds per gallon is roughly 292 pounds spread over fourteen square feet of bottom, which is friendly pressure per square inch but demands flat, continuous support; a pancake tank sagging between two straps will oil-can and fail early.
Alternatives in the neighborhood include the 4H side-dump at 53.75 x 25 x 8 inches, the 20H at 63 x 20.25 x 8.5, and the deeper 48H at 35 x 25 x 12.75; the full family is at RV holding tanks. 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 3H 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 3H - 35 Gallon Plastic RV Holding Tank (64.0" x 32.0" x 8.0") video (62 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.
