Ronco molds four different 15-gallon holding tanks, and the 18H is the general-purpose one - the blank you choose when no single dimension of your bay is doing anything unusual. At 16 lb empty it handles easily during a retrofit, and 15 gallons covers the gray water of a long weekend for two without pushing into the larger footprints.
The other three 15s each solve a specific problem: the 42H is a 15-gallon panel tank at 91.5 x 7 x 16 inches for rail and wall mounting, while the 70H is the heavier-wall 15-gallon build and the 104H a 15-gallon alternative from the newer mold series. Comparing their drawings against your bay is a five-minute job that saves a return.
Like the whole H line, this is a waste vessel for gray or black water - no potable service, ever. Full weight runs about 125 lb, so plan straps and supports for that, not the empty weight. Ronco rotomolds it in Tustin, California, as it has since 1974, and installs your fittings before shipment: print the drawing below, mark your fitting locations, choose spin-weld or threaded. More sizes in the RV holding tanks category. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics 18H 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.
