AO Smith V2042HSL10 V2000 Radiator Valve, 1/8 Inch, 15 psi Steam, Brass, 1-3/16 x 1-11/16 Inch, Nickel PlatedOne-Pipe Steam Thermostatic Radiator Valves - Allow automatic temperature control in one-pipe steam or hot water systems for free standing radiators, convectors and other heating units with standard capacity req