Understand Dishwasher Drain Backflow Issues

What happens here

The video begins by highlighting an incorrectly installed dishwasher drain hose that lies low, increasing the risk of sewage backflowing into the dishwasher. The presenter explains that an air gap (a separate fixture on the countertop) or a high loop (routing the drain hose upwards before connecting to the disposal) are common methods to prevent this issue. It is advised to check local plumbing codes as air gap requirements vary by state.

Goal: The presenter introduces the common problem of dirty water backflowing into a dishwasher due to improper drain line setup and explains two solutions: an air gap or a high loop.