More on nitrogen brazing... Using the Ambro Controls OXYSET and Nitrogen Purge Kit we set up a nitrogen brazing rig. Why is nitrogen brazing important? It avoids the build of copper oxide inside the pipe that can clog up valves within an air conditioning, heat pump or refrigeration circuit. We also utilized the NAVAC Inc. - HVAC Tools Division NTE11H2 Tubing Expander, Pipevise and SolderWeld SilSol 15 distributed by Sealed Unit Parts Co., Inc. #hvac #nitrogenbraze #hvacinstaller #refrigeration #