Backflow Assembly Tester
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