Backflow 

Backflow devices are mechanical devices designed to prevent the backflow of pollutants or contaminants from entering the safe drinking water system.

The state requires that backflows be tested annually. If you have a backflow device, WDWD will send you a reminder notice the month prior to when your test is due. 

This list is provided as a convenience to our customers, and it may not include all available Backflow Assembly Testers. We do not recommend or guaranty any testers. It is your responsibility to verify proper and current certification and other licensing requirements before hiring anyone to perform work on your premises.