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Vacuum Gauges
Positive Solution
Member Posts: 21
in Oil Heating
I use liquid filled vacuum gauges to test oil lines. Recently, I noticed that all of my vac gauges that I store in my van were reading about 3" of vacuum straight out of the box. Is this caused by the severe hot and humid weather we have been having or is it just a coincidence that all 4 of my vac gauges in my van were defective?
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