Ronco lists the RVB533 in its 6.5 gallon class of RV fresh water tanks, with the factory sheet recording a 2 gallon capacity figure for this molding; check the listed numbers against your water budget and space before ordering. It is a light-duty potable tank shipping at approximately 13 pounds, sized for the smallest fresh water jobs in a camper or van build.
Small as it is, the RVB533 is a true Ronco molding: rotationally formed in one seamless piece from natural FDA-compliant polyethylene. The wall carries no pigment, so it stays translucent and shows the water level directly, and the seam-free construction leaves nothing in the shell to leak.
Ronco Plastics produces it in Tustin, California, where the company has rotomolded tanks since 1974, and installs spin-weld or threaded fittings per the customer's specification on every order, standard for the entire line. Where a drawing is shown, it depicts the blank molding before fitting installation. OneSource Plastics is an authorized Ronco Plastics dealer.