Fitting Union Application Air Non-Potable Water Fitting Side A Connection Type Cup Fitting Side B Connection Type FNPT Fitting Side A Copper Tube Size 1 1/4 in Fitting Material Cast Bronze Fitting Side B Pipe Size 1 1/4 in Fitting Side A Tube Outer Diameter 1 3/8 in Maximum Operating Pressure 351 psi @ 200 Degrees F Maximum Operating Temperature 400 Degrees F Specific Fitting Shape Straight Union Standards ASME B16.18 ASTM B584 Alloy C84400 ISO 9001 Material Grade C84400