100 psi seems a lil high.

Going back to my younger days dabling with pressure tests, the tests seemed more focus on how long the system held air, not so much the pressure. I believe we would run around 80 psi on copper and 15 psi on pvc.

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2001 E53 4.4 Alpine White, Sports Package
2000 E36/7 2.8 5 speed Bright Red w/ a HT!