For the 25 gallon fresh water slot in an RV build, Ronco's RVB425 is a light-duty polyethylene tank shipping at 37 pounds. Ronco Plastics rotationally molds it in Tustin, California, where the company has been molding poly tanks since 1974.
The material is FDA-compliant natural polyethylene, the standard for potable RV water, and its translucent wall reads like a gauge glass: the water line is visible right through the tank.
Where most tank makers hand you fixed ports, Ronco installs spin-weld or threaded fittings per order at the locations you specify, on this and every tank it molds; drawings, where shown, depict the blank molding before fitting work. OneSource Plastics is an authorized Ronco Plastics dealer.