no nitrogen flow while brazing?

[curry]

Originally posted by madeinusa

Originally posted by bigtime
Is brazing without purging in the top 25 reasons residential systems fail prematurely? No.

Where is the list, and what were their qualifications to make it?

Where was the research project conducted?

We await for the proof.

ARI standard 6.75 article C

Look it up if you have an ARI subscription.