Fitting Union, Application Air, Non-Potable Water, Fitting Side A Connection Type Cup, Fitting Side B Connection Type MNPT, 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, Fitting Side B 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