Ronco part RVB281 is a 21 gallon light-duty fresh water tank for RV service, shipping at 22 pounds. It gives a travel trailer, camper, or van build a full weekend's potable supply, and it comes from Ronco Plastics' rotational molding plant in Tustin, California, where poly tanks have been made since 1974.
Molded in FDA-compliant natural polyethylene, the RVB281 has a translucent wall that acts as a permanent level gauge; you see the actual water line rather than trusting a sensor.
The tank is finished to your layout, not a generic one. Ronco installs spin-weld or threaded fittings per order at customer-specified locations, standard on every Ronco tank; drawings shown depict the blank molding. OneSource Plastics is an authorized Ronco Plastics dealer.