I have a standard utility (slop) sink. The opening for the drain is 2" and the pvc piping below it is 1.5". I need to replace the PVC drain that came with the sink and am having a devil of a time finding a replacement. In addition, wondering if I should replace with brass instead of PVC drain. The reason it needs to be replaced is that the threads on the drain used to screw the connector below it onto the drain are stripped. Any help would be appreciated. I have been back and forth to Home Depot and Loews and you would think I'm looking for a rare object.