Submit a backflow assembly specification for water purveyor plan review and installation approval on a new construction project
domain: Water purveyor engineering/plan review department · 6 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Submit the backflow assembly specification (make, model, size) as part of the utility plan-review package before installation
Confirm the specified assembly appears on the purveyor's own approved list, which may be narrower than the full USC FCCCHR list
Verify installation location, clearance, and elevation meet the purveyor's installation standard, including indoor vault versus outdoor enclosure requirements
Schedule a purveyor inspection of the installed assembly before it is placed in service
Obtain the initial test, performed by a certified tester, and submit results to establish the account's first compliance record
Confirm meter/service activation isn't finalized until the assembly passes purveyor inspection and initial test
Known gotchas
Purveyor plan review is a separate approval step from the general building permit/plumbing inspection — passing a plumbing inspection doesn't guarantee the purveyor's cross-connection program has separately signed off
Some purveyors require the initial test to be performed by a tester independent of the installing contractor to avoid a conflict of interest
Specifying an assembly that's USC-listed but not on the purveyor's own locally maintained approved list is a common cause of plan-review rejection
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?