What type and size of air hose is required to connect the air supply to the XP Proportioner?
Use a minimum 3/4 in. (19.1 mm) ID air hose when connecting to the Main Air Inlet (MI). Air consumption is 75 cfm per gallon per minute of spraying. Do not use cam-lock type quick disconnects. (Page 25)
From the official Graco Tranzitions XP Proportioner manual, page 25
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