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 3/4 in, Fitting Material Cast Bronze, Fitting Side B Pipe Size 3/4 in, Fitting Side A Tube Outer Diameter 7/8 in, Maximum Operating Pressure 466 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