The NSF White R.O. Storage Tank is a tank to store the reverse osmosis water. It is a pre-pressurized white storage tank. It has a 1/4 inches MPT and 3.2 gallons storage capacity. The inside of the tank has a polypropylene liner and a butyl diaphragm for the water storage area. It has a Schrader Valve for checking the air pressure in the tank. The maximum operating pressure is 100 psi. The tank weighs 9.10 lb. The tank comes with a plastic stand. It is very easy to install. The tank has been NSF tested and certified against ANSI/ NSF Standard 58 for material and structural integrity requirements.