Backflow is the reversal of water flow in a plumbing system — it can allow contaminated water, chemicals, or sewage to enter the clean water supply. Backflow preventers stop this. Knoxville Utilities Board (KUB) requires backflow prevention devices on certain properties and mandates annual testing by a certified tester.
Honey Bear Plumbing provides backflow preventer installation, testing, and repair throughout Knoxville and Knox County. We hold Tennessee contractor license TN CMC-A #83354 and are certified backflow testers. Call (865) 284-2424).
What Causes Backflow?
Backflow occurs when water pressure in the supply system drops suddenly — from a main break, firefighting activity, or high demand — creating a siphon that pulls water backward through the plumbing. It can also occur when a higher-pressure system (like an irrigation pump) pushes water back into the supply.
Without a backflow preventer, contaminated water from an irrigation system, chemical feeder, or industrial process can enter your home's supply or the city's water main.
Who Needs a Backflow Preventer in Knoxville?
KUB and Knox County require backflow prevention devices on:
- Irrigation systems (sprinkler systems connected to the water supply)
- Commercial and industrial facilities with any cross-connection risk
- Medical facilities and dental offices
- Car washes and laundromats
- Swimming pools and spas with fill connections
- Boilers and HVAC hydronic systems
- Any property with a fire suppression system
Residential properties with lawn irrigation systems are among the most common that require backflow preventers in Knoxville.
Our Backflow Prevention Services
Backflow Preventer Installation
We size and install the appropriate device for your system — reduced pressure zone (RPZ) assemblies, double check valve assemblies (DCVA), or pressure vacuum breakers (PVB) depending on the application and local code requirements.
Annual Backflow Testing & Certification
KUB requires annual testing of installed backflow prevention devices by certified testers. We test, document the results, and submit the certification to KUB on your behalf. If the device fails the test, we repair or replace it.
Backflow Preventer Repair
Failed check valves, seized relief valves, and corroded assemblies are common issues with aging backflow devices. We repair all makes and models and retest to confirm proper function.
Backflow Preventer Replacement
Older or failing assemblies that cannot be economically repaired are replaced with new, code-compliant devices. We handle all required documentation and testing after installation.
Backflow Testing Requirements in Knoxville
KUB requires annual backflow testing for all required devices. Testing must be performed by a KUB-certified backflow tester and results submitted to KUB within the deadline specified on your notification. Failure to test can result in KUB shutting off your water service.
If you've received a KUB backflow testing notice and need a certified tester, call Honey Bear Plumbing at (865) 284-2424 and we'll schedule the test, perform it, and submit the results for you.
How Much Does Backflow Prevention Cost in Knoxville?
Frequently Asked Questions — Backflow Prevention Knoxville TN
Is backflow testing required in Knoxville?
Yes. KUB requires annual backflow preventer testing for all commercial properties and residential properties with irrigation systems that have a connected backflow device. KUB sends annual testing notices — the test must be done by a certified tester.
How long does backflow testing take?
A standard backflow test takes 30–60 minutes for most residential devices. We handle the paperwork and KUB submission.
What happens if my backflow preventer fails the test?
If the device fails, it must be repaired or replaced before being retested. We can repair or replace on the same visit in most cases and retest to confirm it passes before we leave.
Do I need a backflow preventer if I have a lawn irrigation system?
Yes. Any irrigation system connected to the KUB water supply in Knoxville requires a properly installed and annually tested backflow prevention device. Many homeowners have irrigation systems without realizing this requirement applies to them.
Need backflow testing or installation in Knoxville? Call Honey Bear.
(865) 284-2424 — certified testers, KUB submissions handled for you.
This Service in Other Areas
Frequently Asked Questions
Yes. Knoxville Utilities Board (KUB) requires annual backflow preventer testing for commercial properties and residential properties with irrigation systems that have a connected backflow device. Testing must be performed by a KUB-certified tester. Honey Bear Plumbing handles the testing and submits results to KUB.
Annual backflow testing in Knoxville runs $75–$150 for residential devices and $125–$250 for commercial devices. If the device needs repair, most minor repairs run $100–$300. Device replacement runs $300–$700 installed. Honey Bear Plumbing provides upfront pricing.
Yes. Any irrigation system connected to the KUB water supply requires a properly installed and annually tested backflow prevention device. Many Knoxville homeowners have irrigation systems without realizing this requirement applies to them.
A failed backflow device must be repaired or replaced and retested. Honey Bear Plumbing can repair or replace on the same visit in most cases and retest to confirm it passes before leaving your property.