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Old Nov 20, 2012, 10:48 PM
A6INTRUDER is offline
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Portland Intl, Oregon, United States
Joined Jul 2003
1,196 Posts
I didnt use a MAC valve either. Actually never heard of them.
When I built my system, I just put a small hole in the hose between the check valve and the pump. (used a pin to poke the hole)
It lets the vacuum bleed off at the pump but not on the on the bag side of the check valve. I tested it and it doesn't seem to lessen the amount of vacuum much either.
Simple fixes are sometimes the best.
TIM
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