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.
So do exactly that: print the drawing below for this tank and the one for the 57H, the other 16-gallon 63 x 10 x 8 inch molding, overlay your bay sketch, and mark your fitting locations on the winner. Ronco installs every spin-weld or threaded fitting to your marks before it ships.
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. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics 58H 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.
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).
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.
