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Mission statement

Provider narrative and compliance posture

Official tester listed on IRWD's district roster and on San Diego's approved tester list.

This profile does not override the utility's official rules. It exists to make the public provider layer inspectable after the governing workflow is clear.

Before booking this provider

Match One Flow Backflow Inc. to the Irvine Ranch Water District Backflow Prevention workflow

The strongest local provider pages do not stop at a phone number. Confirm the authority source, the utility's tester gate, the report route, and the proof trail before you schedule or send a failed device back for retest.

Official source Southern California tester profile grounded in IRWD and San Diego rosters.
Due trigger Upon utility notice and annually thereafter - IRWD says customers will be notified when a backflow assembly is required and points them to a partial list of certified testers who can perform testing in the district.
Notice clue Look for the utility name, service address, assembly serial number, account or notice ID, and due date.
Report proof Report acceptance depends on the governing tester route and the utility's submission method; confirm status before scheduling.
Submission route IRWD backflow prevention assembly test and maintenance report form
Credential gate Orange County Health Care Agency-approved backflow assembly tester status, Certified tester listing or equivalent certification, IRWD test and maintenance report form
Failed-test branch Ask whether repair, retest, and final submission are all handled under the same utility workflow.
Open utility workflow Official tester route Request local help
Regional coverage map
Jurisdictional coverage

1 mapped metro support page(s).

Coverage

Utility coverage

2 mapped utility pages

Utility count 2
Metro count 1
Guide links 5
  • Official tester listed on IRWD's district roster and on San Diego's approved tester list.
  • Authority source
  • Last reviewed 2026-04-05
Service area

Area served across mapped utility pages

States California
Cities Irvine, San Diego
Counties Orange County, San Diego County
  • Backflow testing
  • Backflow compliance support
  • Annual testing coordination
  • Failed test follow-up
  • Irrigation backflow testing
  • Fire line backflow testing

Verification basis

  • 2 mapped utility pages
  • 2 mapped utilities with an official tester route
  • 0 mapped utilities using a directory route
  • 2 mapped utilities with structured submission steps
  • Latest mapped utility verification: 2026-06-29
Covered utilities

Utility pages this provider is mapped to

california

Irvine Ranch Water District Backflow Prevention

IRWD is a good California district page because it clearly explains when the district will require an assembly, what assembly types it recognizes, and where customers can find certified testers.

  • Due basis: IRWD says customers will be notified when a backflow assembly is required and points them to a partial list of certified testers who can perform testing in the district.
  • Notice clue: Look for the utility name, service address, assembly serial number, account or notice ID, and due date.
  • Submission route: IRWD Backflow Prevention
  • Proof to keep: Report acceptance depends on the governing tester route and the utility's submission method; confirm status before scheduling.
Open utility page Official tester route
california

City of San Diego Public Utilities Backflow Program

San Diego is one of the best California fits because the city publishes annual testing rules, an approved tester list, a tester-orientation gate, and explicit enforcement consequences.

  • Due basis: San Diego says all backflow devices are tested annually and points customers to the approved tester list when the Public Utilities Department contacts them for compliance.
  • Notice clue: Look for the utility name, service address, assembly serial number, account or notice ID, and due date.
  • Submission route: San Diego Backflow Program
  • Proof to keep: Report acceptance depends on the named portal and the utility-approved tester route; keep proof that the report was submitted.
Open utility page Official tester route
Support guides

Guides that match this provider's utility mix

Approved testers vs find a tester Why official tester lists and commercial directories must stay separate, and what each page type is allowed to claim.
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How we verify local backflow rules What counts as an official source, how local utility pages override generic assumptions, and how stale pages are re-verified.
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Backflow reporting portals: BSI, SwiftComply, WEIRS, VEPO, Aqua, Tokay, and SpryBackflow Find how BSI Online, SwiftComply, WEIRS, VEPO, Envirotrax, Aqua Backflow, TrackMyBackflow, Tokay WebTest, SpryBackflow, and utility customer portals affect backflow test report submission after the field test.
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Backflow test due dates: anniversary date vs calendar deadline Why some utilities track annual backflow tests by anniversary date, while others use a calendar window, notice date, or hard deadline.
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Residential vs commercial backflow rules Why the local trigger is rarely just residential versus commercial, and how utilities actually split hazard, irrigation, multifamily, and managed-property cases.
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Profile maintenance

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