Watts LFM116 GRV B 20 200 PI 8 Part of the LFM116 Series Hanes Geo floor elevations floor elevations Specifications Air Valve No Brand Watts Buy American Act Compliant NO Case Finish Chrome Case Material Steel Dial Size 3 IN EAN 098268590685 Entry Style Bottom Inlet Connection Size 1 2 IN Inlet Connection Type Male Threaded Lead Free YES Manual Shutoff No Maximum Operating Temperature Fahrenheit 140 Minimum Temperature Fahrenheit 32 Part Number 0121721 Pressure Scale Does Not Apply To Product Sensing Element Yes Sensing Fluid No Series LFTBR Stem Shaft Material Brass Temperature Range 32 to 140 degrees F Thermostat Probe Length 3 IN Thermowell Yes VR Retaining Valve No Window Material Kostil Polymer Specification Sheet LFTBR and throttle toward closed when upstream pressure falls below the adjustable setpoint it serves as a pressure relief control valve