AO Smith V2040ASL15 V2000 Radiator Valve, Horizontal Angle Pattern, 1/2 Inch, NPT, 150 psi Hot Water, 15 psi Steam, 2.5 Cv, 59100 BtuH Heating, Bronze, 1-1/8 Inch x 2-1/8 Inch, Includes: Valve Body and Steam Air Vent ? Continually monitors and adjusts room temperature for consistent comfort and relief from under heatin