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Backflow Assembly Tester

Certification Program

The purpose of the Backflow Assembly Tester (BAT) certification program is to protect the health of the citizens of the state of Washington. Washington State Department of Health (DOH) regulations require anyone who inspects, tests, and/or monitors backflow prevention assemblies to pass the state’s certification examination and hold a valid certificate. 

To become certified as a Backflow Assembly Tester (BAT), an applicant must pass the Washington State BAT Certification Examination. Washington does not have reciprocity with other states’ BAT certification programs or examinations. There is no education, training or experience required to apply to take a BAT certification examination.

Certified BATS are required to pay an annual renewal fee established by DOH. To demonstrate continued competency, they must also pass the BAT Professional Growth Examination during each reporting period.