Single-digit part numbers in Ronco's catalog mark the old guard, and the 7H is one of them - a 16-gallon holding tank that has been in continuous production long enough to have replaced its own earlier installations. When a mold stays in service across decades of RV platforms, it is because the shape keeps fitting; OEMs designed bays around these blanks, which is exactly what makes them findable as replacements today.
The practical numbers: 16 gallons of gray or black water capacity, an 18 lb blank, roughly 133 lb at full. Waste service only - the H series carries no potable rating, and fresh water belongs in Ronco's separate W line.
If you are cross-shopping the 16-gallon class, the 29H gives you a defined 36 x 22 x 9.25 inch rectangle and the 57H runs long and narrow at 63 x 10 x 8 inches. All the shapes are gathered in the RV holding tanks category, and the maker's complete range at the Ronco Plastics hub.
Still rotomolded where it always has been: Tustin, California, since 1974. Fittings are installed per order to your layout - print the drawing below, mark your fitting locations, and select spin-weld or threaded. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics 7H 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.
