Non-major repair on a medium-, high- or very high-pressure appliance that won't be evacuated to atmosphere afterward. Evacuate to?

References

Answer: No higher than 0 psig. For non-major repairs where the appliance won't be evacuated to the atmosphere afterward, EPA skips the deeper Table 1 levels. You evacuate to no higher than 0 psig before opening.

1. 40 CFR 82.156 Required practices (Cornell LII) www.law.cornell.edu/cfr/text/40/82.156

   Be evacuated to a pressure no higher than 0 psig before it is opened if it is a medium-, high- or very high-pressure appliance

   Checked 2026-10-10.
2. 40 CFR 82.156 Required practices (Cornell LII) www.law.cornell.edu/cfr/text/40/82.156

   For the purposes of oil changes, be evacuated or pressurized to a pressure no higher than 5 psig

   Checked 2026-10-10.
3. 40 CFR 82.156 Required practices (Cornell LII) www.law.cornell.edu/cfr/text/40/82.156

   A technician must verify that the applicable level of evacuation has been reached in the appliance or the part before it is opened.

   Checked 2026-10-10.

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