header bg

Question:

If you are using a recovery machine manufactured BEFORE November 15, 1993, you must evacuate any low-pressure appliance to ______ before making a major repair.

A 25 inches of Hg vacuum
Explaination

If you are using a recovery machine manufactured BEFORE November 15 1993, you must evacuate any low-pressure appliance to 25 inches of Hg vacuum before making a major repair.