Reducer Application Potable Water Fitting Side A Connection Type Cup Fitting Side B Connection Type Cup Fitting Side A Copper Tube Size 1/4 in Fitting Side B Copper Tube Size 3/16 in Fitting Material Wrot Copper Fitting Side A Tube Outer Diameter 3/8 in Fitting Side B Tube Outer Diameter 5/16 in Maximum Operating Pressure 779 psi @ 100 Degrees F Maximum Operating Temperature 250 Degrees F Specific Fitting Shape Straight Reducing Coupling Precleaned Not Pre-cleaned