Reply To: Copper/Cast Iron Union Corrosion Home › Forums › Public Forums › General Plumbing › Copper/Cast Iron Union Corrosion › Reply To: Copper/Cast Iron Union Corrosion 30 Aug 2003 at 12:41 am #295037 Harold KestenholzParticipant If you just cut the tubing and leave a lip projecting into the tube, instead of cutting it off inside to the tube wall thickness, the inside lip will make the water turbulent to wear the tube out at that location.
