Coupling Application Air Gases Potable Water Fitting Side A Connection Type Cup Fitting Side B Connection Type Cup Fitting Side A Copper Tube Size 5/8 in Fitting Side B Copper Tube Size 5/8 in Fitting Material Wrot Copper Fitting Side A Tube Outer Diameter 3/4 in Fitting Side B Tube Outer Diameter 3/4 in Maximum Operating Pressure 505 psi @ 200 Degrees F Maximum Operating Temperature 400 Degrees F Specific Fitting Shape Straight Coupling Includes Center Stop No Center Stop