Union Application Air Non-Potable Water Fitting Side A Connection Type Cup Fitting Side B Connection Type Cup Fitting Side A Copper Tube Size 2 1/2 in Fitting Side B Copper Tube Size 2 1/2 in Fitting Material Cast Copper Fitting Side A Tube Outer Diameter 2 5/8 in Fitting Side B Tube Outer Diameter 2 5/8 in Maximum Operating Pressure 336 psi @ 100 Degrees F Maximum Operating Temperature 400 Degrees F Specific Fitting Shape Straight Union