Forty gallons is the workhorse size for gray tanks on mid-size coaches - big enough that showers do not fill it in a weekend, small enough to package under the floor. The 84H is the lightest of Ronco's four 40-gallon holding shells at 28 lb, a one-piece rotomolded polyethylene molding with no seams to fatigue and no factory-cut holes to work around.
Full weight is the number that matters for mounting: 40 gallons of waste runs roughly 334 lb, hanging from whatever straps or cradle you give it. The other three 40-gallon shapes are the 5H at 56.5 x 19 x 12.5 inches, the heavier-walled 103H, and the 71H; one size down is the 39-gallon 55H at 49 x 24 x 10 inches.
Match the 84H's outline to your bay using the drawing below - print it, verify, then mark your drain, vent, and inlet locations on the sheet. Fittings are installed per order in Tustin, California, spin-welded or threaded to your marks, by the shop that has been rotomolding tanks since 1974. Gray and black water only; this is not a potable molding. Full range: RV holding tanks.
OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics 84H 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.
