I just recently replaced everything in my shower. Everything has gone OK except for the pipe coming out of the wall that hooks to my showerhead. I have PVC coming up to a elbow, then the showerhead pipe connecting to the elbow. It's leaking where the showerhead pipe & elbow meet. No matter what I do it still leaks. I took off showerhead & tried re-tightening many times and I also have applied teflon tape. Does anybody out there have any suggestions as to why this pipe will not stop leaking. Any help would be appreicated. Thanks!!