Backflow Tester List

State rules

Ohio

Ohio’s Division of Industrial Compliance certifies backflow technicians for isolation devices under Revised Code section 3703.21. The Division’s page says a person who installs, tests, or repairs an isolation backflow prevention device must be certified. That requirement does not apply to containment devices. An isolation device prevents backflow of liquids, solids, or gases within a building and is regulated by the building code. A containment device prevents backflow into a public water system and is installed by the supplier, or as a requirement of the supplier. Class A covers any isolation device. Class B is limited to lawn-irrigation process piping. Class C covers isolation devices owned by a public water system.

Checked against official sources on October 11, 2026. Rules and links change; confirm with the office listed before you act.

Try a ZIP like 30303, “Travis County” or “Columbus, OH”
Drinking-water agency
The Ohio Division of Industrial Compliance certifies backflow technicians for isolation devices under section 3703.21.
Who may test an assembly
A certified backflow technician of the required class may install, test, or repair an isolation device. Containment devices are outside that certification requirement.
Official program page
Official page →

The certification page says an applicant shows at least five years of relevant experience, completes a 24-hour course at an approved agency with a hands-on exam, and scores at least 70 percent. The page lists a 50-dollar application fee, a 50-dollar examination fee, and a 75-dollar certification fee. Renewal on that page is every three years with an eight-hour course, a practical test, and a 75-dollar renewal fee. Those figures are Division charges for the credential, not a customer’s test price, so the fee field in this record stays empty.

Rule 1301:3-7-02 matches the three classes to the location of the device. A lawn-irrigation isolation device requires Class A or Class B. An isolation device owned by the public water system requires Class A or Class C. Other isolation devices require Class A. The rule says the superintendent may allow an applicant who holds another state’s certification to complete an eight-hour Ohio recertification course and then receive the certification. The examination rule says the Division or its designee prepares, administers, and scores the exam.

Because containment devices are outside this certification, ask whether the assembly is isolation or containment before you rely on the Division card. Public-water containment remains the supplier’s requirement. The Division page explains how to verify a certification. It does not name an ASSE or ABPA card as a substitute for Class A, Class B, or Class C. Rule 1301:3-7-02 is the section that sets those classes.

Official resources in Ohio

Ohio backflow overview

Separates isolation devices, which require certification, from containment devices, which do not.

Backflow technician certification

Defines Class A, Class B, and Class C and lists the course, exam, and fees stated on the page.

Ohio Administrative Code 1301:3-7-02

Makes it unlawful to install, test, or repair an isolation device without the matching class of certification.

Key facts for Ohio

What to do next

  1. Ask whether the device is an isolation device or a containment device before you ask for an Ohio backflow technician card.
  2. Match the class to the job: irrigation can be Class B, but a general building device needs Class A.
  3. Verify the certification the way the Division’s backflow page describes.
  4. For a containment device at the service, ask the public water supplier what it requires.

Looking for your city or county in Ohio?

We haven't found official program-level pages for Ohio we can verify yet, so we don't show local numbers here rather than guess. Here's what to use instead, in order:

  1. General Start with the statewide information above. It applies across Ohio, but cities and counties can add their own steps, fees or deadlines.
  2. Call to confirm Ask the official office. They have the current local rule, fee and form.
    Ohio Division of Industrial Compliance backflow certification
    Website →
    Phone not shown: use the contact page on the official website above.
    Your city or county office: Local governments →
    Not sure who handles it locally? USAGov's free help line, 1-844-872-4681, or the Ohio page on USA.gov can point you to the right office.
  3. Know the current info? Tell us and include a link to the official page. We check every tip before it goes up.

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