Vapor Line+Extension hose with valve+Filter dryer+Recovery pump inlet+Recovery pump outlet+Recovery tank liquid inlet 1. Connect hoses 2. Purge the hoses 3. Turn on the Recovery pump 4. Cool down the Recovery tank with a bucket of ice water mixture 5. Shut off the Recovery pump(0 psig no leak detected, 2 psig for residential units, 5 psig leak dectected)