I needed to replace the drain pipe on one of my bathroom sinks due to leaks. For under $5 I bought the pipe replacement kit and a roll of thread tape. I utilized the existing down pipe from the sink drain to connect into. After removing old pipes I taped the threads and tightened together everything.
Total time taken to install j - pipe kit: a half hour.
Total money saved by not calling the Plummer: about $120 and no leaks.
Thank you to Home Depot, your staff is very helpful and knowledgeable. I will be returning another time for some interior paint.