Solder DWV Adapters Application Drain Vent Waste Fitting Side A Connection Type Cup Fitting Side A Copper Tube Size 1 1/2 in Fitting Side B Copper Tube Size 1 1/4 in Fitting Material Bronze Fitting Side A Tube Outer Diameter 1 5/8 in Fitting Side B Tube Outer Diameter 1 3/8 in Specific Fitting Shape Straight Adapter Standards ASME/ANSI B16.22 MSS SP-104 NSF/ANSI/CAN-61 Compatible Tube Material Copper