Ronco Plastics builds the RVB370 for the 45 gallon RV fresh water role: enough capacity for extended dry camping in a motorhome or large trailer, molded heavy at about 92 pounds shipping weight. The duty rating is light-duty potable fresh water, which is the class RV drinking water systems call for.
What sets a Ronco tank apart is that it ships finished for your installation, not as a generic blank. Spin-weld or threaded fittings are installed by Ronco at the exact locations your order specifies, standard across the line, and any drawing shown represents the blank molding before those fittings go in. For replacements, that means you can duplicate the port layout of the tank coming out.
Material and process carry the rest: FDA-compliant natural polyethylene with a translucent wall that reads the water level at a glance, rotationally molded into a seamless one-piece shell with no joints to fail. The RVB370 is molded in Tustin, California, where Ronco has operated since 1974, and OneSource Plastics offers it as an authorized Ronco Plastics dealer.