Taco® Flo-Cheks Have Dependably Stopped Gravity Circulation In Forced Hot Water Heating Systems For Over 40 Years.
Flo-cheks open automatically when the circulator starts running. Thumb screw manually opens the valve. Can be used in systems with multiple circulator zones to allow heat to flow only into the zones that are calling for heat. Maximum operating pressure of 125 psi and temperature of 277°F.