Fourteen gallons is where a holding tank stops being a day tank and starts covering a real trip: enough gray water margin for several days of dishes and quick showers for two. The 40H hits that mark at a trim 15 lb empty, making it one of the easiest mid-size blanks to maneuver into a finished coach where you are working through an access hatch.
Choosing in this range is mostly a shape problem, and Ronco molds enough shapes to solve it. One gallon down, the 26H is a compact 13-gallon blank; two gallons up, the 29H carries 16 gallons at 36 x 22 x 9.25 inches. Lay the candidates' drawings over your bay measurements and the winner is usually obvious - the full field is in the RV holding tanks category.
The 40H is a waste-only vessel: gray or black water, no potable claims. Full, it holds about 117 lb of contents. It is rotomolded in Tustin, California - Ronco's home since 1974 - and ships with fittings already installed where you want them: print the drawing below, mark your fitting locations, and specify spin-weld or threaded. Browse the maker's complete line at the Ronco Plastics hub. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics 40H 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.
