Airgap AG200-006 Dishwasher Air Gap with Skirted Cap and Extra Long Threaded Body For Thick or Thin Kitchen CountertopsAirgap AG200 006 A dishwasher air gap is a critical component in maintaining a clean dishwasher. It prevents contaminants in the sink from flowing into the dishwasher and is required by plumbing code in most states. The AG200 006s maximum flow rate is 14 gallons per minute (GPM). The maximum flow rate through this air gap is the highest flow rate above which the air gap will overflow. At maximum flow rate, the air gap is dry on the outside. The