Step 5 · Connect the Air Tube
Take the flexible plastic air tube included in the kit. Firmly push one end onto the small air nipple located on the bottom of the air switch button you installed in the sink. Route the tubing towards the power control module, being careful to avoid sharp corners, hot water pipes, or areas where it could be pinched or kinked. Push the other end of the tube firmly onto the corresponding air nipple on the power control module. If the tube is excessively long, you can trim it with a utility knife, but it's wise to leave some slack for future servicing.