A:Answer Rigo01, the KDTE334GPS Dishwasher can be installed with an Air Gap, please refer to your local codes to see if one is required. The KDTE334GPS can be installed either with or without the air gap, Please refer to the installation instructions for the options, here is a link for you: https://s3.amazonaws.com/sm-backend-production-attachments/installation-instructions-W10806906-RevE.pdf