On paper the 58H and its sibling are twins - both 16-gallon holding tanks, both 63 x 10 x 8 inches, both 19 lb blanks. The difference lives in the mold: each carries its own arrangement of molded features and its own drawing, which is why Ronco keeps both numbers alive. When a channel-shaped bay measures five-plus feet long and about ten inches wide, these two tanks are the shortlist, and the drawings settle which one plumbs cleaner from your dump-valve side.
If the channel is shorter but wider, the 29H reshapes the same 16 gallons to 36 x 22 x 9.25 inches. Every other footprint in the waste line is in the RV holding tanks category.
This is a gray/black water vessel with no potable rating - keep it out of the fresh system. Full, it carries about 133 lb. Rotomolded in Tustin, California, Ronco's home base since 1974. 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 58H 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 58H - 16 Gallon Plastic RV Holding Tank (63.0" x 10.0" x 8.0") video (63 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.
