Under Sink Dishwasher Air Gap

An under-sink dishwasher air gap is a crucial component of your dishwasher's plumbing system. It helps prevent contaminated water from flowing back into your drinking water supply. Here's an overview of what it is, why it's important, and how to install and maintain it.

What is an Under-Sink Dishwasher Air Gap?

An under-sink dishwasher air gap is a small device installed on the countertop or sink. It has two openings: one is connected to the dishwasher's drain hose, and the other is vented to the atmosphere. When the dishwasher drains, water flows through the drain hose into the air gap. The vent allows air to enter the drain hose, creating an atmospheric pressure break. This prevents water from siphoning back into the dishwasher or your drinking water supply.

Why is an Under-Sink Dishwasher Air Gap Important?

An air gap is essential for maintaining the safety of your drinking water. Without it, contaminated water from the dishwasher could potentially flow back into the water supply if the dishwasher malfunctions or the drain becomes clogged. This can pose a health hazard, as the water may contain bacteria or other harmful contaminants.

Installing an Under-Sink Dishwasher Air Gap

Installing an air gap is a relatively straightforward process. Here's how to do it:

Gather your tools: You'll need a drill, a screwdriver, a utility knife, and a sealant.
Choose a location: Select a location on the countertop or sink that's close to the dishwasher's drain hose.
Drill a hole: Using the drill, create a hole in the countertop or sink for the air gap.
Mount the air gap: Insert the air gap into the hole and secure it with the screws provided.
Connect the drain hose: Cut the dishwasher's drain hose to the desired length and connect it to the air gap's inlet.
Seal the connections: Apply sealant around the connections to prevent leaks.
Test the air gap: Run the dishwasher to ensure the air gap is functioning properly and there are no leaks.

Maintaining an Under-Sink Dishwasher Air Gap

To keep your air gap in good working condition, follow these maintenance tips:

Inspect the air gap regularly: Check for any cracks, leaks, or blockages.
Clean the air gap: Use a mild cleaning solution to wipe down the air gap and remove any dirt or debris.
Replace the air gap if necessary: If the air gap is damaged or worn, it should be replaced.