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If installing or replacing a copper line on an AC unit you must 'braze' the line with an acetylene and air tank mixture. Use 10 psig on the O2 tank and 5 psig on the acetylene tank. You will need a need a 'neutral' flame. You can not get enough heat by using a propane torch. You will need enough heat to melt the 5% silver solder.

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13y ago

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