Trying to braze the fitting will very likely melt the O-ring material and thus introduce contaminants into the system that could cause other system issues, so the fittings should never
Troubleshooting
What should I do if a fitting leaks after pressing?What should I do if a fitting leaks after pressing?
If the fitting was recently pressed (15-20 minutes) prior to pressurization, it is possible the bubbles are a result of trapped air in the double crimp area that can leak
What should I do to ensure that a fitting doesn’t leak after pressing?What should I do to ensure that a fitting doesn’t leak after pressing?
• Verify the tubing does not have scratches, incise marks and dents prior to tube cutting. Be careful when using a knife to cut off plastic shipping caps or insulation