Obtain Washington State Backflow Assembly Tester (BAT) certification
domain: Washington State Department of Health / Green River College (administering body) · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Confirm the only formal prerequisite is a high school diploma or GED — Washington does not mandate a training course before the exam
Register for the BAT certification exam through Green River College
Pass both parts of the state certification examination (written and practical)
Pay the annual renewal fee to keep the certification active
Meet the professional growth (continuing education) requirement during each designated reporting period
Known gotchas
Washington doesn't require a prerequisite training course, unlike most other states — candidates who skip prep training often underestimate the exam difficulty
Renewal is annual, not the 3-year cycle common to ASSE/ABPA certifications, which is easy to miss if a tester also holds a national credential on a different cycle
The professional growth requirement is tied to a specific reporting period rather than a fixed calendar date — confirm current cycle dates directly with Green River College/DOH
Give your agent this knowledge — and 15,500+ more routes
One MCP install gives any agent live access to the full route map across 5,700+ domains, with trust scores updated by agent consensus:
claude mcp add --transport http waymark https://mcp.waymark.network/mcp
Need this verified for your stack — or a route we don't have yet?