The RVB247 is the expedition tank of Ronco's light-duty book - listed on the maker's own sheet as the B-247 L.D., it is a one-hundred-and-twenty-five gallon fresh water molding, the kind of capacity that changes what an RV is for. This is water for a crew, for weeks rather than weekends, for the desert routes where the next spigot is a rumor. Very few coaches carry a bay for it; the ones that do were built around exactly this class of tank.
It is translucent natural polyethylene, FDA approved for potable water, and at this scale the see-through wall is the difference between knowing and guessing - a flashlight against the tank tells you your remaining range in one look. The blank is molded without fittings; Ronco spin-welds or thread-installs them at the locations you mark, so the ports serve your plumbing rather than the other way around. Print the drawing below, plan against the actual bay, and enter the layout in the on-page fitting planner.
The tank ships at 123 lb, and the water it holds will outweigh it many times over - so treat the installation as structure, with the load spread across the bay floor, and fill against a scale the first time to learn what it does to your axle weights. Molded in Tustin, California by a shop rotomolding since 1974.
Nothing else in the light-duty line matches this capacity - the RV67W is the next size down if the bay is tight. The rest of the range is in our RV water tank category and on the Ronco Plastics hub; freight on a molding this size is worth quoting early in the freight estimator. OneSource Plastics is an authorized Ronco Plastics dealer.