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Old 07-04-2013, 08:06 PM   #1
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brazing filler for A/C lines

I'm wondering about alternatives to 15% stick braze.

I've seen some HVAC workers claim that brazing is not necessary, that they use soft silver solder like sta brite 8. I even recall one guy (sta brite user) claim that he could do it with 60/40 if he wanted to and it would be plenty strong.
I assume there's a reason why high temp brazing with 15% rod is the industry standard and not 5% or 8% solder?

Assuming 15% is necessary, what do you think about pre measured brazing rings, like Harris Rings of Fire or Lucas Sil-Fos Rings? These products seem perfect for the DIY who may have done brass stick brazing on steel but has never brazed tubing. Instead of applying the rod to the outside of the joint and hoping to guess when enough has penetrated, you start with a ring of braze inside the joint and when it comes out around the whole joint you know the joint is filled. Are they as foolproof as they look, assuming you clean the joint and have it firmly shoved together when you apply the heat?


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Old 07-04-2013, 08:26 PM   #2
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Stay-Brite roll is good up to 450psi work clean flux and sand paper steel wool no vibrations....small line the 3/8ths easy on the heat and don't us a turbo tip (only if your a steamfitter) get a soft tip ... your in


Last edited by biggles; 07-04-2013 at 08:48 PM.
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Old 07-04-2013, 09:50 PM   #3
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If staybrite 8 is only good up to 450 PSIG. Its not any good for R410A then.
When posting in certain forums, knowing your location will help others give better feedback/advice/solutions to your questions.
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