The R-K FTV series float valve is designed to provide maximum efficiency in controlling the liquid level in storage tanks. They can be installed by using a tank adapter directly through the tank wall or with simple piping over the top edge of the tank. The FTV will automatically keep your tank at desired level, preventing overflow by providing positive shutoff. Dynamic seal o-rings are teflon encapsulated viton for long life and trouble free operation. The reliability of this valve has been proven in thousands of installations invloving acids, caustics, plating solutions, clean and waste water