While specific brands are listed, the core tools required are pliers, a standard screwdriver (multi-bit is handy), and a scrub brush for cleaning. You will also need a reliable flashlight, a bucket, and plenty of towels or rags to manage spills. Any good quality versions of these basic tools will suffice.

The most important safety step is to disconnect power to your dishwasher at the circuit breaker before you begin to prevent electrical shock. Also, wear gloves to protect your hands from potential grime and use the bucket and towels to contain any water that might spill during the process.

Yes, this project is rated as beginner difficulty, primarily involving basic hand tool use. While the estimated time is 3 hours, a simple cleaning often takes less than an hour. A full replacement might take closer to 1-2 hours depending on how easily the old unit removes and the new one installs.

If cleaning the air gap didn't fix the issue, the blockage might be further down the drain line or within the dishwasher itself. First, check the drain hose that connects from the air gap to your sink's drain connection for kinks or clogs. If that's clear, you may need to inspect the dishwasher's internal drain filter or pump.