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Regarding vacuuming a system, I hooked up the vacuum pump to the S last weekend as I wanted to charge the AC. After vacuuming for 20 minutes I closed off the valves on the gauges, shut off the pump, and watched the pressure. After a few minutes it began to gradually climb, and after 10-15 minutes it had climbed from -0.8 to -0.7 kg/hg. Anyone have an idea as to the type or severity of the leak this points to?
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