How to Store Copper Line Sets Safely 87836: Revision history

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26 September 2026

  • curprev 11:1911:19, 26 September 2026‎ Daylinmgyb talk contribs‎ 31,989 bytes +31,989‎ Created page with "<html><p> The vacuum pump wouldn’t pull below 1,800 microns.</p> <p> Not 900. Not 700. Not even close.</p> <p> By 2:15 p.m., the attic was 118°F, the homeowner was pacing downstairs, and a brand-new ductless heat pump was sitting useless because the <strong> copper line set</strong> had picked up moisture before it ever reached the wall bracket. Here’s the part that bothers good installers: that failure didn’t start at the flare nut. It started in storage. One tor..."