Backflow Prevention Device Certification in Knoxville, Tennessee (2026)
Without a valid Backflow Prevention Device Certification, your Knoxville restaurant is at risk of significant utility fines, potential water service interruption, and can fail a crucial health inspection. This official certification, also known as a cross-connection control test report, is required by the Knoxville Utilities Board (KUB) to ensure your plumbing system doesn't contaminate the public water supply. Key details for your business:
- 21 fields – ApronPrep auto-fills 17 from your dossier
- $35–$35 per device test (paid directly to a state-certified tester)
- Timeline varies depending on contractor scheduling
- Annual renewal is required to maintain compliance
Analyzed from Backflow Prevention Device Certification
81% from one compliance interview
Manual entry or document upload required
Why You Need a Backflow Prevention Device Certification
The Backflow Prevention Device Certification is a mandatory requirement in Knoxville mandated by the city's Sewer Use Ordinance and enforced by Knoxville Utilities Board (KUB). These regulations, specifically designed to protect the public water supply, require that any commercial establishment, including restaurants, install and maintain an approved backflow prevention assembly on their water service line. The legal authority stems from local plumbing and health codes adopted from the Tennessee Department of Environment and Conservation (TDEC) standards, which require cross-connection control programs to prevent contaminated water from flowing backward into the municipal system.
Failure to maintain a valid, current certification carries significant, immediate penalties. Your restaurant's application for a health permit or business license will not be approved without it. If your certification lapses after opening, you face:
- Service Disconnection: KUB can and will shut off your water service until the device is tested and certified by a licensed tester, effectively closing your restaurant.
- Fines and Fees: You will incur reconnection fees and may face daily fines for non-compliance until the issue is remedied.
- Required Remediation: If backflow occurs due to a faulty device, you become liable for all costs of purging and testing the public water system.
- Permit & Insurance Risk: Operating without this certification violates your lease's compliance clauses and voids premises liability coverage related to water contamination.
Legal code: Local sewer use regulations, water connection requirements, road/sidewalk ordinances, grease discharge limits
Recent update: As of 2026, Knoxville Utilities Board (KUB) now requires all new commercial certifications and renewals to be submitted electronically through their Cross Connection Control portal, eliminating paper submittals.
Who Needs a Backflow Prevention Device Certification?
| Type | Required | Notes |
|---|---|---|
| Restaurant (Full-Service) | Required | Required, as Knoxville Plumbing Code § 608.16.4 mandates a Reduced Pressure Principle Assembly (RP) for any facility with a direct connection to the potable water system and a process that could create a health hazard. |
| Bar / Nightclub | Required | Required, because the installation of post-mix soda guns, glass washers, or any pressurized system where a chemical or non-potable substance could backflow creates a health hazard per City of Knoxville Utilities and IAPMO standards. |
| Food Truck | Not Required | Not directly required for the vehicle itself; compliance is typically verified at the commissary kitchen where the truck is serviced, which must have a certified device. |
| Coffee Shop / Café | Required | Required if the equipment (e.g., espresso machines with direct water connections, commercial steamers) is directly plumbed, as defined in the Knoxville Plumbing Code § 608. |
See which restaurant types need this requirement — and which don't.
See Full Requirements →Field-by-Field Guide (21 Fields)
17 of 21 auto-filledRestaurant Legal Name
textEnter your restaurant's exact legal business name as it is registered with the Tennessee Secretary of State or on your business license, which must match official records used by the Knoxville Water Quality office.
COMMON MISTAKE: Using a DBA (Doing Business As) name instead of the registered legal entity name, which can cause a rejection as it doesn't match the Knoxville Water Quality's records.
Restaurant Address
textEnter the complete physical street address of the restaurant facility where the backflow device is installed, including street number, name, and suite or unit if applicable, which must match the address on file with Knoxville Utilities.
COMMON MISTAKE: Providing a mailing address, P.O. Box, or the owner's home address instead of the physical service location, leading to a mismatch with the water utility's service records.
Primary Contact Name
textEnter the full name of the person authorized to manage this certification, typically the owner, manager, or facility supervisor who can schedule inspections and receive official correspondence.
Contact Phone
textProvide a direct, working phone number for the primary contact, including area code, where they can be reached during standard Knoxville business hours for scheduling and verification calls.
COMMON MISTAKE: Listing an inactive number, a number that consistently goes to voicemail, or a personal cell number without voicemail set up, which can delay the inspection scheduling process.
Contact Email
textEnter a valid, monitored business email address for the primary contact to receive official submission confirmations, test result notices, and renewal reminders from Knoxville Water Quality.
Has Existing Backflow Device
textAnswer 'Yes' or 'No' to indicate whether a backflow prevention assembly is currently installed on the property's water service line, as required by Knoxville's Cross-Connection Control Program.
COMMON MISTAKE: Leaving blank or entering unclear responses like 'Maybe' or 'I think so,' which requires manual follow-up and delays the application; a definitive 'Yes' or 'No' is required.
Device Type (RP or DC)
textSpecify the exact model type of the installed device, such as 'Reduced Pressure (RP)' or 'Double Check (DC) Valve Assembly,' which is typically listed on a tag attached to the device or in prior test reports.
COMMON MISTAKE: Guessing the type or entering generic terms like 'backflow preventer'; an incorrect classification can lead to an inspector arriving with the wrong testing equipment, causing a failed inspection.
Device Location on Property
textDescribe the precise location of the device for the inspector, such as 'in basement mechanical room, east wall,' 'in exterior meter box near dumpster,' or 'after the main shut-off valve in the kitchen.'
COMMON MISTAKE: Providing vague descriptions like 'in the back' or 'by the water main,' which can lead to a missed inspection appointment and rescheduling fees if the inspector cannot find the device.
Device Accessible for Testing
checkboxCheck this box to confirm the device is not obstructed by stored items, locked behind a sealed panel, or buried, and that the test ports are clear for the certified tester to attach gauges.
COMMON MISTAKE: Checking the box when the device is actually obstructed, which results in an immediate 'failed accessibility' report, a re-inspection fee, and a 30-day compliance deadline from Knoxville Water Quality.
Has Water Connection Documentation
checkboxCheck this box if you possess documentation like the water service account number, a copy of the plumbing diagram, or the original installation permit, which helps verify the service line configuration.
ApronPrep auto-fills 17 of 21 fields from a single compliance interview — no re-typing, no guessing what the government expects.
Top 5 Backflow Prevention Device Certification Mistakes
1. Incorrectly Listing the Device Type & Assembly Number
Entering a generic name like "Backflow Preventer" instead of the specific model (e.g., "Watts 009QT" or "Febco 825Y") and its stamped serial/assembly number causes immediate rejection. The Knoxville Utilities Board (KUB) cross-references this with their installation records. A missing or mismatched assembly number adds a 2-3 week delay while an inspector verifies the device on-site. Locate the metal tag on the device itself for the correct details.
2. Using the Wrong Tester Credentials or Expired License
Submitting a certification performed by someone not currently licensed by the State of Tennessee's Board of Licensing Contractors (Plumbing Division) invalidates the entire test report. The tester's name, license number, and expiration date must be current and match state records. An application with an expired license is returned, requiring a re-test by a qualified professional—a costly mistake that resets your timeline by 1-2 weeks. Always verify your tester's active status on the state's online license lookup before scheduling.
3. Misreporting Test Results or Pressure Values
Transposing numbers on the test report (e.g., writing 7.2 PSI for the relief valve opening pressure instead of 2.7 PSI) or leaving required fields blank flags the application for manual review and likely failure. Each device has specific pass/fail pressure thresholds per ASSE/AWWA standards. Even a small clerical error here often results in a "Correct and Resubmit" notice, adding 10-14 business days to your approval. Double-check every entered value against the tester's handwritten field sheet before submission.
Skip the Paperwork on Your Backflow Prevention Device Certification
ApronPrep auto-fills 17 of 21 fields from one compliance interview.
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Backflow Prevention Device Certification by City in Tennessee
| City | Fee Range | Timeline |
|---|---|---|
| Knoxville | $35 per backflow device test (may vary by contractor and device complexity; contact contractor for exact quote) | 1-3 weeks from initial contact to certification completion; Annual recertification required |
| Memphis | Contact MLGW Commercial Services for current certification and testing fees; annual recertification fees typically apply | Initial inspection: 1-2 weeks after scheduling; Device certification: 1-4 weeks depending on whether upgrades are needed; Annual recertification: Ongoing requirement |
| Nashville | Contact Nashville Codes and Construction Permits Department for current inspection and certification fees | 2-4 weeks from request to inspection scheduling; inspection typically completed within 1-2 business days of appointment |
Government Filing Fees
$35 per backflow device test (may vary by contractor and device complexity; contact contractor for exact quote)
Timeline: Varies
Step 1: Determine backflow prevention device type required for your restaurant (RP - Reduced Pressure or DC - Double Check valve) based on water usage classification
Review your restaurant’s plumbing plan and cross-connection survey to identify whether you need an RP (higher hazard, like dishwashing or boiler connections) or DC valve (lower hazard). Your water usage classification is determined by the City of Knoxville Water Department’s hazard rating guidelines; mismatched device type is a primary cause of inspection failure and requires a costly re-installation.
Step 2: Contact City of Knoxville Water Department to confirm device requirements and obtain any necessary inspection forms
Call the Water Department’s Cross-Connection Control Program at (865) 215-2100 or email waterquality@knoxvilletn.gov with your restaurant’s address and proposed device type. Request the official Test and Maintenance Report form (TN-CCR-1) if not available online; failure to use the state-mandated form leads to immediate rejection.
Step 3: Select a State of Tennessee Certified Backflow Device Contractor from the approved list
Choose a contractor from the Tennessee Department of Environment & Conservation’s (TDEC) online list of certified testers. Verify their certification is current and includes the specific device type you need (RP or DC); uncertified contractor tests are not accepted by the city.
Where to Apply
Applications are handled by your local department of public works (dpw) in each city. Select your city below for authority details, fees, and processing timeline.
Other Requirements You'll Need
This is one of 13 requirements for opening a restaurant in Tennessee.
ADA Compliance Self-Certification
federal
Alarm System Permit/Registration
local
Alcohol Server Training Certification
state
Annual Report Filing
state
See all co-required forms and how they connect to your compliance dossier.
See All RequirementsThe timeline varies as it's contingent on device installation, testing, and inspection scheduling. According to the Knoxville Utilities Board (KUB) requirements, the process is typically coordinated with your licensed tester and can take several weeks from device installation to final certification acceptance. You must schedule and pass the inspection, and submit all required paperwork before receiving your certification from KUB.
You will need to pay a government filing fee of $35 to the Knoxville Utilities Board (KUB) for the annual certification registration. This fee is separate from the potentially higher costs for device purchase, installation, and the required annual test performed by a licensed backflow tester. All fees are per the KUB's current fee schedule — verify with KUB for any updates.
No, certifications are specific to the device, its installation location, and the property's plumbing configuration. A new certification is required for any device at a new location, similar to how a new Building Permit is required for new construction. You must submit a new application and test report to the Knoxville Utilities Board for the new site.
You must renew annually. The Knoxville Utilities Board (KUB) requires a certified backflow tester to test the device each year and submit the test report to KUB along with the renewal fee. Failure to renew on time can lead to penalties and water service interruption. Keep this schedule separate from other annual requirements like your Annual Report Filing with the state.
A KUB-approved, licensed backflow tester will conduct the inspection and performance test. They will verify the device is the correct type for the hazard, is installed correctly, and operates properly to prevent contaminated water from flowing back into the public supply. The tester then submits the official test report to KUB, which is your primary certification document.
About This Data
This guide is generated from ApronPrep's compliance dossier system, which uses 53 parallel AI authority experts to discover requirements, then downloads actual forms and generates field-level intelligence for each one.
For Tennessee specifically, we have analyzed compliance dossiers for 3 cities (Knoxville, Memphis, Nashville), generating Rich FILs (Form Intelligence Layers) with 21 form fields analyzed for this requirement. Fee data is sourced from actual county department fee schedules, not estimates.
Our data is verified against official government sources and updated when regulatory changes are detected. If you find an error, please report it — accuracy is our core commitment.
Sources
- Local sewer use regulations, water connection requirements, road/sidewalk ordinances, grease discharge limits
- Knoxville — Department of Public Works (DPW)
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