Good. You must solder with a nitrogen purge to prevent contaminants from getting into the lines. No problem anymore. This melts at a much lower point but gives a stronger bond without annealing the copper lines to keep them from softening. Watch some videos before trying. Try a few joints before delving into AC power lines. Not exactly the same as sweating with standard solder, but close. Worked like a champ and my heat pump is working great. N2 is not required. Without oxy/acetylene. Requires only mapp gas
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