This pre-pressurized blue metal storage tank has a 1/4 in NPT connection port and approximate 3 gallons storage capacity. The tank is used for storing reverse osmosis water and has been NSF tested and certified against ANSI and NSF standard 58 for material and structural integrity requirements. The inside of the tank has a polypropylene liner and utilizes a butyl diaphragm for the water storage area. The plastic tank stand is included.