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Backflow decision system

What happened with your water-control device?

Identify the device, check the symptom, then confirm the rule for your water utility.

Start with what you can see ↓

Start here

Choose the event, not a technical term

You do not need to know the model yet.

01I received a test noticeFind the test, tester, and local reporting path.→ 02It is leaking or dischargingStart with location, timing, weather, and recent work.→ 03My device failed a testRepair, retest, and close the utility record.→ 04I need to identify the deviceSeparate RPZ, PVB, double-check, and look-alikes.→ 05Sewage is backing upUse the separate sewer backwater-valve lane.→ 06House pressure is high, low, or unstableMeasure PSI and separate regulator symptoms from supply or fixture problems.→

Have a notice?

Find the exact utility record

Enter the city, utility, portal, or identifier printed on the notice.

96 published utility records5 states coveredOfficial and commercial routes kept separate

Device passports

Four systems people commonly mix up

Potable waterBackflow preventer

RPZ, double-check, irrigation, and testable assemblies.

 Air-inlet protectionVacuum breaker

PVB, atmospheric, and hose-bib device families.

 Sewer laneBackwater valve

Drainage reversal protection, separate from drinking water.

 House pressurePressure regulator

Measure static and flowing PSI before adjustment or replacement.
Browse the complete field libraryDevices, failures, repair paths, installation, and testing

How a verdict is built

Observation first. Local authority last.

  1. 01Identify

    Use the nameplate, openings, pipe system, and visible geometry.

  2. 02Decide

    Use safe checks and stop conditions without pretending to diagnose remotely.

  3. 03Verify

    Open the governing utility record for tester, deadline, and submission facts.

High-intent field desk

Move from the label to the right job.

Use the exact model, installation scope, or device family before comparing parts or work.

PartsFind repair kits by model and size InstallCheck installation requirements and detail IdentifyCompare RPZ with other backflow preventers

Source-backed records

See the local layer in practice

These pages retain the official utility evidence already built in this domain.

arizonaCity of Avondale Backflow and Cross-Connection ControlVerified 2026-06-29 californiaCity of Anaheim Cross Connection ControlVerified 2026-06-29 coloradoAurora Water Backflow PreventionVerified 2026-06-29 floridaBroward County Water and Wastewater Services Backflow CertificationVerified 2026-06-29 texasArlington Water UtilitiesVerified 2026-06-29