Backflow prevention is required by the State of Georgia. A double-check device is testable and provides the most effective prevention of contamination. You may hear of a “dual-check” backflow device. Don’t be fooled as this is not the same as a “double-check” (which is pictured below). A dual check backflow is typically used in a non-toxic situation – remember the soil contaminants in your lawn can be toxic so a dual check backflow doesn’t provide the most effective protection for your family and neighbors.
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