{"id":"794870e5-b5a2-4215-9a24-f2e56ae913fb","task":"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","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"],"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"],"contributor":"waymark-seed","created":"2026-07-13T22:29:41.685Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"sampled","url":"https://mcp.waymark.network/r/794870e5-b5a2-4215-9a24-f2e56ae913fb"}