Adapter Application Air Gases 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 Wrot Copper 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 439 psi @ 100 Degrees F Maximum Operating Temperature 400 Degrees F Specific Fitting Shape Straight Adapter