Asked by: Guaire Joye
asked in category: General Last Updated: 25th January, 2020

Do I need an air gap if I have a garbage disposal?

Air gaps of appropriate design are required for water safety by legislation in many countries. In the base cabinet under the sink, the drain hose from the dishwasher feeds the "top" of the air gap, and the "bottom" of the air gap is plumbed into the sink drain below the basket, or into a garbage disposal unit.

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In this regard, do you need an air gap for a dishwasher if you have a garbage disposal?

When there is a garbage disposal installed, the dishwasher drain line should run down from the air gap or high loop and connect to a side nipple on the disposal, where it connects with a hose clamp. Do not bypass the garbage disposal if it is present.

Similarly, how do I hook up an air gap garbage disposal?

  1. Connect DISHWASHER OUTLET HOSE (5/8" O.D.) to AIR GAP inlet (smaller diameter leg) and to DISHWASHER outlet using HOSE CLAMPS.
  2. Insert AIR GAP through sink deck hole, leaving approximately 1/2"of the body threads showing above sink deck.
  3. Remove all components from Strainer Body (1).

Accordingly, is an air gap necessary?

Air gaps are the most effective means of preventing your drain from cross-contaminating your dishwasher with waste. If you want to protect your dishwasher from flooding with contaminated water, you need an air gap. Dishwasher air gaps are also required by plumbing codes in many locations.

How does an air gap work?

As with the faucet and the sink, an air gap separates the two hoses. If everything works properly, the dishwasher pumps waste water to the air gap where it's moved away by the drain hose to the garbage disposal. This may remove food particles interfering with the normal water flow.

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