Every catalog starts somewhere, and Ronco's starts here: the 1H, part number one, a 20-gallon holding tank that has been in the line since the Tustin, California shop began rotomolding in 1974. Molds do not survive five decades on sentiment - they survive because OEMs kept designing bays around them, which is why the 1H remains one of the most likely direct-fit replacements for an aging coach's original waste tank.
The numbers are classic mid-size: 20 gallons, a 19 lb blank, about 167 lb at full. Service is gray or black water exclusively; no tank in the H series holds a potable rating, and the fresh system gets Ronco's separate L.D. water moldings.
The catalog that grew around it offers alternatives at the same capacity - the 77H, a flexible 20-gallon blank, and the 65H, the lightest 20-gallon body - and at larger sizes like the 3H with 35 gallons at 64 x 32 x 8 inches. Browse the descendants in the RV holding tanks category or the whole family at the Ronco Plastics hub.
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 1H 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
Interactive 3D model with live fill. This tank has an interactive 3D model built to its manufacturer dimensions. Rotate it, and set a fill level to see how much liquid it holds at any height. Open the 3D view on the product photo above. Download the 3D model (GLB).
Product video. Watch the Ronco Plastics 1H - 20 Gallon Plastic RV Holding Tank 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.
