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Watts LFN55BM1 DU CEF 1 Part of the LFN55B M1 Series Egress System Specifications Air Valve No Brand Specifications Air Valve No Brand Watts Buy American Act Compliant NO Case Finish Zinc Plated Case Material Steel Dial Size 2 1 2 IN EAN 098268589283 Entry Style Back Inlet Connection Size 1 2 IN Inlet Connection Type Male Threaded Lead Free YES Manual Shutoff No Maximum Operating Temperature Fahrenheit 248 Minimum Temperature Fahrenheit 32 Part Number 0121668 Pressure Scale Does Not Apply To Product Sensing Element Yes Series LFTB Stem Shaft Material Brass Temperature Range 32 to 248 degrees F Thermostat Probe Length 2 IN Thermowell Yes Window Material Kostil Polymer Specification Sheet LFTB UPC 098268786286