Hi Folks,
I have a mini split 'kit' which came with copper line sets. The line sets were capped with plastic plugs, but the kit sat idle for over a year as construction had been put on hold. Now that the unit is ready to be installed I removed the plastic plugs to inspect the copper flare ends. I saw that both the outsides and the insides of the pipes appear tarnished / blackened. The flares look ok, but I am prepared to clean and re-flare the ends if needed. My concern is with the tarnish on the insides of the pipe - and if it can cause compressor damage or valve clogging. The unit will be professionally installed with a triple evac, but I am wondering if the tarnish/residue on the insides of the pipe will be a problem. The lines have already been run inside walls, so replacement is not ideal. If the tarnish is a problem, can the lines be flushed, or do they absolutely need to be replaced?
Thanks very much,
Jack
I have a mini split 'kit' which came with copper line sets. The line sets were capped with plastic plugs, but the kit sat idle for over a year as construction had been put on hold. Now that the unit is ready to be installed I removed the plastic plugs to inspect the copper flare ends. I saw that both the outsides and the insides of the pipes appear tarnished / blackened. The flares look ok, but I am prepared to clean and re-flare the ends if needed. My concern is with the tarnish on the insides of the pipe - and if it can cause compressor damage or valve clogging. The unit will be professionally installed with a triple evac, but I am wondering if the tarnish/residue on the insides of the pipe will be a problem. The lines have already been run inside walls, so replacement is not ideal. If the tarnish is a problem, can the lines be flushed, or do they absolutely need to be replaced?
Thanks very much,
Jack
source https://hvac-talk.com/vbb/threads/2227316-New-but-tarnished-copper-pipe?goto=newpost
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