Ronco molds six different 25 gallon holding tanks, and the 31H is the one to start from when you are mapping the family. Same capacity across the board; what changes is the envelope, and the envelope is what decides whether the tank goes in. The dimensioned members set the extremes: the 45H stretches 74 x 15 x 8.25 inches for underbelly runs while the 11H keeps a conventional 37 x 20.25 x 11.5 box. The 95H is the lightest blank of the group.
The 31H itself weighs about 26 pounds empty, and like all of its siblings it is a sanitation tank: gray water, black water, nothing potable, ever. Full, 25 gallons at 8.34 pounds per gallon means roughly 208 pounds bearing on the mounting.
All six come out of the same Tustin, California plant where Ronco Plastics has rotomolded since 1974, and all six ship with fittings installed per order, spin-welded or threaded to your layout. The drawing below prints at scale; mark your inlet, outlet, and vent positions on it, or use the click-to-place planner, and your tank is built to that sheet. The broader line lives at RV holding tanks. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics 31H 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.
