Step 7 · Install the New Air Gap (Optional)
Take your new air gap kit. From the top of the sink, insert the threaded body of the new air gap through the hole. Ensure any gaskets included are properly seated. From under the sink, thread the new mounting nut onto the air gap body and tighten it until it is snug. Hand-tight plus a quarter-turn with pliers is usually sufficient. Now, reconnect the hoses. The smaller-diameter hose (from the dishwasher) attaches to the smaller inlet nipple on the air gap. The larger-diameter hose (to the garbage disposal) attaches to the larger outlet nipple. Secure both with their clamps.