Each cooling coil located in an air stream for which moisture may be condensed shall have a nonsweating condensate drip pan of sufficient size and depth to catch all of the condensate from the coil. Each condensate drip pan shall be provided with a drain pipe of adequate size to prevent overflow of the drip pan but in no case shall such drain be less than 3/4 inch (19.05 mm) nominal pipe size. Condensate drain piping shall discharge through an air gap into the waste receptor. The minimum air gap shall be equal to two times the internal diameter of the condensate drain piping Condensate drain piping and condenser water piping shall comply with the applicable provisions of the Building Services Piping Code, ANSI B 31.9.