Profile: United States Resin Company specializes in providing resins, filtration media, portable stainless steel exchange tanks, exchange tank parts, and custom made tanks. Our SS-model softener is a compact and portable softener with no moving parts. The tank is constructed of stainless steel with low carbon content. Our tank has heli-arc welded top & bottom, and fusion seam-welded shell. Our poly glass exchange tank is used for light commercial water treatment. It is provided with a exchange head and 4.5 inches threaded openings. We also offer connector plugs, brass caps, tank connectors, hex head screws, and O-rings.