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danpatm
Sep 2, 2011, 09:40 AM
It has been a while since I hooked up a vacuum pump to a system, I got the manifold hooked up to the high and low side and center hooked to micron gauge and pump. My question is when taking down to a vacumm do I have both high and low gauges open?

Dr1757
Sep 2, 2011, 10:32 AM
Yes both valves need to be open.

danpatm
Sep 2, 2011, 11:54 AM
Thanks that is what I thought.