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No. should not be needed.
Sorry, there was a problem. Please try again later.Dear Customer: An air gap is not required for dishwasher intallation, however it is an option. If you'd like to view the installatin instructions in detail, please choose the following link: http://www.whirlpool.com/digitalassets/WDT790SAYM/Installation%20Instruction_EN.pdf Hopefully this information is beneficial to you. Thank you for your inquiry regarding our Whirlpool appliances!
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