Backflow Testing & Certification
Protecting your water supply — and your family's health.
A safe water supply is something most of us take for granted. Backflow prevention devices are what keep contaminated water from reversing direction and entering your clean supply — and Indiana requires they be tested by a licensed professional.
L.E. Isley & Sons provides expert backflow testing, repair, prevention, and certification across Marion, Boone, and Hamilton Counties. We catch issues before they become a health hazard, and we provide the documentation you need to stay compliant.
- Required
- Annually (Indiana)
- Testers
- State-licensed
- Result
- Compliance certificate
- Pricing
- Flat-rate, upfront
What We Do
Our backflow services
Annual testing
Yearly testing of your backflow prevention device, as required, to confirm it's protecting your supply.
Certification
Upon completing a test or installation, we provide a certificate confirming a compliant, reliable job.
Repair
Fixing failed or failing prevention devices so your water stays safe and your home stays compliant.
Prevention guidance
Helping you understand and maintain your system so problems are prevented, not just repaired.
Know the Signs
Why backflow testing matters
It's required by the state
The Indiana Department of Environmental Management requires installers and testers of backflow devices to hold a state-issued license. We do.
Contamination is a real risk
Without a working device, wastewater can reverse into your supply, carrying bacteria and waste that are dangerous to ingest.
Yearly testing prevents costly problems
Testing annually catches issues early — a well-maintained system saves significantly on repair costs down the road.
Discolored or foul water
If water entering your home looks or smells contaminated, stop using it and call us to assess the situation.
Compare
Annual testing vs. skipping it
| Tested & certified | Untested | |
|---|---|---|
| Water safety | Protected | Contamination risk |
| Compliance | Certified | Out of compliance |
| Cost of problems | Prevented early | Costly cleanup |
Honest Pricing
What affects the cost
Backflow testing is flat-rate and quoted up front, with certification included. Factors:
Test vs. repair
An annual test is straightforward; if the device fails, repair or replacement adds to the cost.
Device type & size
Larger or more complex backflow preventers take more to test and service.
Certification
We provide the required compliance certificate as part of the job.
Number of devices
Homes with multiple devices, such as irrigation, need each one tested.
Online Coupon
$25 OFF
Any General Plumbing Service
Applies to invoices over $150. Offers cannot be combined; valid toward standard pricing only. Limit one offer per household per visit. Must be presented prior to starting the job. Valid through Dec 31, 2026.
The Isley Way
How backflow testing works
Test the device
Our state-licensed technicians run the required field test procedures on your backflow preventer.
Diagnose any issues
If the device fails or is weakening, we identify exactly what needs repair or replacement.
Repair if needed
We restore the device to full, compliant working order.
Certify the job
You receive a certificate documenting a reliable test that meets all legal requirements.
In Their Words
What our neighbors say
Knowledgeable and competent — and always punctual, courteous, and respectful. He spotted problems we were unaware of before they became bigger ones.
They called early and arrived on time, shared preventative-maintenance tips, and were super reasonably priced.
Local Expertise
A family tradition since 1915
We've upheld a reputation in the Westfield area since our founding in 1915. We understand how dangerous backflow can be, which is why we hold the state licensing this work requires and treat every test and certification with the care your family's water deserves.
FAQ
Backflow Testing — common questions
Backflow is when water flow reverses direction, allowing contaminated water — often containing waste or bacteria — to enter your clean supply. A backflow prevention device stops this, and testing confirms the device is working.
Annual testing is the standard, and it's required for many properties under Indiana regulations. Testing yearly also catches device problems early, before they become expensive or hazardous.
Yes. When we complete a backflow test or installation, we provide a certificate confirming the work is reliable and fully compliant with state requirements — exactly what you need for your records.
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