We have a sink in our garage that is leaking at the trap. I took it apart and found that the pipe behind the trap needs to be replaced. The pipe is about 10 inches long and then goes into a cast iron pipe. I unscrewed the coupling for the pipe to cast iron but I cant get the pipe out of the cast iron pipe. I have tried heating it with a torch, and twisting with a pipe wrench... How do i get this pipe out and what do you recommend I replace it with?
