One of my outbuildings has an entire copper stack, and replacing it is not an option right now. All the connections to the stack are from former sinks with 1-1/4 threaded connections, making it very easy to connect a nice new chrome drain pipe to it. My problem is that I am installing a new utility sink, which uses a standard 1-1/2" drain, and I also need the nipple to connect a dishwasher to the tailpipe. How do I connect 1-1/2" PVC to this old brass connection? I am hoping there is some sort of slip joint reducing adapter that will allow me to use the same style gasket over the PVC before I tighten the nut? I couldn't find anything on SupplyHouse. Thanks in advance for your help.