I had same problem. pressure test confirmed that the new pipe also leaked! so what I did was trim the stainless pipe's lugs back so that the o ring seats further back into the pipe. then gently bend the lower lugs to clamp the pipe ho place and prevent it from moving out. be careful though, only trim a bit off at a time because you can't stu material back on the pipe. problem solved, providing there's no leaks anywhere else ho the pipework. plus it still looks standard