What Happens During a Backflow Test — and What the Certification Paperwork Actually Means

If you received a backflow testing notice from the City of Dayton Water or Greene County Water, you are not in trouble — but you do have a real deadline. Ohio Admin. Code 3745-95 requires water systems to run annual cross-connection control programs, and many jurisdictions send notices in September and October because compliance cycles reset January 1. The good news: the appointment itself is straightforward, and understanding what happens step by step makes the whole process far less stressful.

Why Did You Get a Testing Notice — and Why Now?

Annual notices go to any property with a backflow preventer on record, and fall is the busiest season because most Ohio water authorities align their renewal cycles with the calendar year.

The notice means your water authority has a device registered to your address — a Reduced Pressure Zone (RPZ) assembly, a Double Check Valve Assembly (DCVA), or a Pressure Vacuum Breaker (PVB) on an irrigation system. Each of these must be tested annually by a certified tester under Ohio EPA rules. Notices also go out after a change of ownership, a new service connection, or a post-repair inspection.

Irrigation system owners often find fall timing useful for another reason: PVBs should be tested before the system is winterized and shut down. Testing and shutdown can be coordinated in a single visit, which saves a separate trip in spring.

Which Devices Require Annual Testing in Ohio?

Not every backflow device is testable — the type installed on your property determines exactly what the technician will do during the visit.

RPZ assemblies are required in high-hazard applications like fire suppression lines and chemical injection systems; they must be tested annually. DCVAs cover moderate-hazard connections and are also tested annually in most Ohio jurisdictions. PVBs are common on irrigation systems and require annual testing where cross-connection control programs apply. Atmospheric Vacuum Breakers (AVBs) are generally not testable and require only a visual inspection. Most residential properties only have testable devices if they have an irrigation system; commercial properties almost universally have at least one testable assembly.

For commercial property owners managing multiple systems, pairing your backflow compliance with a broader commercial property inspection can consolidate documentation into one visit and simplify your recordkeeping.

Step-by-Step: What the Technician Actually Does

A single-assembly appointment typically runs 30 to 45 minutes from arrival to departure, with the active testing phase lasting about 15 to 30 minutes.

The technician first locates the assembly — commonly in a mechanical room, a meter pit, or near the irrigation shutoff. The downstream shutoff is closed, causing a brief water interruption that usually lasts under five minutes. A calibrated differential pressure gauge kit (which must itself be annually calibrated under Ohio rules) is attached to the test cocks on the assembly.

From there, each check valve and relief valve is tested independently. On an RPZ, the technician verifies that the relief valve opens at the correct pressure differential. On a DCVA, both check valves are tested to confirm they hold pressure. Readings are held and recorded on a standard test report form that captures the device serial number, model, installation location, and each individual pressure reading.

Once readings are complete, the kit is removed, water is restored, and the technician checks briefly for leaks. The documentation is completed on-site before the technician leaves.

What Happens If the Device Fails?

A failure means one or more components are out of tolerance — a check valve that does not hold pressure or a relief valve that opens at the wrong differential. The device cannot simply be retested without a repair or replacement first.

After the repair is complete, a retest is required, and a new certification report is generated from that second test. Some technicians can perform the repair and retest in the same visit. Your jurisdiction will be notified of the failure, and you typically have 30 to 60 days to remediate depending on your water authority. Acting quickly after a failure result keeps you from hitting that window.

Understanding Your Certification Paperwork

The document you receive after a passing test is the formal compliance record — its full name varies ('Backflow Assembly Test Report,' 'Cross-Connection Control Test Report') but its required fields are consistent across Ohio jurisdictions.

A valid report includes the property address and account number, the assembly type, manufacturer, model, and serial number, the test date and the tester's certification number, individual pressure readings for each component, a pass/fail determination, and the tester's signature. Most water authorities want the report submitted within 30 days of the test date. Submission method varies — some jurisdictions accept electronic filing, others require mailed or faxed forms.

Property managers overseeing multi-tenant buildings should keep their own copies. An audit trail of annual reports protects you during property sales, supports insurance documentation, and fills any gaps if the water authority's records do not reflect a prior submission. A missing report in your file is a problem that is easy to avoid.

Do You Need to Be On-Site During the Test?

Someone needs to provide access to the device location, but that person does not have to be the property owner — any designated adult who can unlock the space works for residential properties.

For commercial sites, a building engineer or facilities contact who can open a locked mechanical room is sufficient. Property managers often coordinate access and do not need to be physically present the entire time. Irrigation system testing simply requires access to the backflow assembly near the shutoff valve; landscaping staff can facilitate this just as easily as the property owner.

Knowing what to expect before you schedule means fewer surprises on the day of the visit, and a compliant property is one where your water authority records match your own.

Schedule your backflow testing and certification before the fall backlog builds — certified testers in the Dayton and Greene County area fill up quickly in October and November as year-end deadlines approach.

Explore your options and book before your compliance deadline with A1 Property Pros LLC.