Watts 740 035 FS 1 1 2 Part of the 740 Series Access Tile Specifications Air Precharge 60 PSI Specifications Air Precharge 60 PSI Air Valve No Body Material Copper Brand Watts Buy American Act Compliant NO Connection Size 1 IN Connection Size Metric 25 MM Connection Type Socket EAN 098268499421 Factory Set Pressure PSI 60 Lead Free YES Maximum Operating Temperature Celsius 82 Epoxy coated cast iron body with anchor flange and membrane clamp with weepholes for long term durability and seepage protection The valve can be used for hot water space heating boiler applications to protect against excessive pressure non metallic disc to metal seating