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Home Inspection Maintenance Tip - Dishwasher Anti-Siphon Device
Home Inspection Maintenance Tip - Dishwasher Anti-Siphon Device

In the course of performing home inspections, I often find dishwasher drain lines which are improperly installed. Improperly installed drain lines from a dishwasher may allow water from the sink or food waste disposal to be siphoned into your dishwasher. Not good!
 
If your dishwasher drain line enters the sink cabinet near the bottom and curves upward to connect directly to the food waste disposer or drain T, you may be in danger to contaminates and even food poisoning. This condition can easily allow dirty sink water and other contaminates to be siphoned from the sink/disposer into a running dishwasher.
 
There are at least two ways to solve this potential health problem;
 
1. Install an air gap valve at the kitchen sink.
2. Create a high drain loop in the dishwasher drain line to create an air gap.

Shown in the attached diagram are these two methods.



The health and safety of you and your family are important to Selman Home Inspections. I encourage you to take a few minutes to examine your own dishwasher drain line configuration. This is not a costly repair and can ... more

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