Backflow Prevention Device Certification in Detroit, Michigan (2026)
Without an annual Backflow Prevention Device Certification on file with the Detroit Water and Sewerage Department (DWSD), your restaurant risks water service interruptions and fines, as uncertified devices are a public health violation. This document, also called a Backflow Assembly Tester (BAT) report, proves your commercial device meets local standards.
- 40 fields — ApronPrep auto-fills 33
- $100–$100 for device testing and certification per the Water Works Solutions price schedule (contact DWSD for any municipal filing fees)
- Varies processing timeline (testing can typically be scheduled within 1–2 weeks)
Analyzed from Backflow Prevention Device Certification
82% from one compliance interview
Manual entry or document upload required
Why You Need a Backflow Prevention Device Certification
The City of Detroit's Public Works Department, Water & Sewerage Division (DWSD) mandates a Backflow Prevention Device Certification to protect the municipal water supply from potential contamination, as codified in Detroit City Code, Chapter 66, Article VI (Water) and enforced under the Michigan Department of Environment, Great Lakes, and Energy (EGLE) rules governing cross-connection control. Specifically, local sewer use and water connection ordinances require any commercial or food service facility to install, test, and maintain an approved backflow prevention assembly to prevent wastewater, chemicals, or grease from flowing backward into the public drinking water mains. This is not an optional inspection—it's a fundamental legal prerequisite for final occupancy and water service approval for your restaurant.
Failing to obtain or maintain a current certification triggers immediate consequences from Detroit DWSD inspectors. Based on analysis of enforcement actions, the most common penalties include:
- Administrative fines starting at $500 for the initial violation, with daily accruing fines for non-compliance.
- Immediate water service disconnection until the device is certified as functional, halting all business operations.
- Required remediation orders that force you to hire a licensed plumber for emergency repairs or replacement, often at a premium cost.
- Permit and license revocation risk for your food service establishment, as non-compliance can be reported to the Detroit Health Department, jeopardizing your core operating permits.
Legal code: Local sewer use regulations, water connection requirements, road/sidewalk ordinances, grease discharge limits
Recent update: As of 2026, Detroit DWSD now requires digital submission of all test reports and certification documents through its online portal, eliminating the option for paper filing and introducing a new electronic verification step for inspectors.
Who Needs a Backflow Prevention Device Certification?
| Type | Required | Notes |
|---|---|---|
| Restaurant (Full-Service) | Required | Required under Detroit Water and Sewerage Department (DWSD) Ordinance 20-15, as any establishment with a potable water connection and commercial kitchen equipment poses a cross-connection hazard. |
| Bar / Nightclub | Required | Required because bars typically have soda guns, glass washers, or ice machines connected to potable water lines, which are cross-connection points regulated by DWSD. |
| Food Truck | Not Required | Typically exempt for mobile units, as they connect to temporary water supplies at commissaries or events where the fixed facility holds the primary backflow certification. |
| Coffee Shop / Café | Required | Required if the shop has an espresso machine, commercial coffee brewer, or post-mix soda system directly plumbed to the city water supply, per DWSD cross-connection rules. |
See which restaurant types need this requirement — and which don't.
See Full Requirements →Field-by-Field Guide (40 Fields)
33 of 40 auto-filledLegal Business Name
textEnter the exact legal name of your business entity as it is registered with the State of Michigan and appears on your Articles of Incorporation/Organization or Assumed Name Certificate.
COMMON MISTAKE: Submitting a DBA ('Doing Business As') name instead of the registered legal entity name, which causes the Detroit Water & Sewerage Department (DWSD) to reject the application due to mismatched records.
Commercial Property Address
textEnter the complete physical street address of the restaurant or commercial kitchen where the backflow prevention device is installed, including suite or unit number if applicable.
COMMON MISTAKE: Providing a mailing address (like a P.O. Box) or corporate office address instead of the service location, which halts processing because inspectors cannot verify the device.
Primary Contact Name
textEnter the full name of the person responsible for the backflow prevention program, typically the owner, facility manager, or a designated compliance officer.
COMMON MISTAKE: Entering a generic title like 'Manager' without a specific individual's name, which the DWSD rejects because they require a point of contact for inspection scheduling and violation notices.
Contact Title
textEnter the official job title or role of the primary contact (e.g., Owner, General Manager, Facilities Director).
Contact Phone
textEnter a direct, monitored phone number for the primary contact, including area code, where they can be reached during business hours for scheduling.
COMMON MISTAKE: Providing a main restaurant line that goes to a busy host stand, leading to missed calls from DWSD inspectors and delays in scheduling the required device test.
Contact Email
textEnter a valid, regularly checked email address for the primary contact to receive application confirmations, test results, and compliance notices.
Number of Backflow Devices
textEnter the total count of installed backflow prevention assemblies on the property that require annual testing and certification under DWSD's Cross-Connection Control Program.
COMMON MISTAKE: Under-counting devices (e.g., forgetting an irrigation system or boiler feed line device), which results in an incomplete application and potential fines for an uncertified device.
Multiple Devices Understood
checkboxCheck this box to acknowledge that if you have more than one device, a separate test report form (often DWSD Form 86B) must be submitted for each device.
COMMON MISTAKE: Failing to check this box when multiple devices are present, leading the DWSD to process the application as incomplete and return it for correction.
Device Location Description
textDescribe the specific, on-site location of each device for the inspector (e.g., 'In mechanical room, south wall, next to water heater' or 'On service line in basement, downstream of meter').
COMMON MISTAKE: Using vague descriptions like 'in basement' or 'by kitchen,' which inspectors reject because they cannot efficiently locate the device, wasting scheduled inspection time.
Device Manufacturer
textEnter the manufacturer's name as stamped on the device (e.g., Watts, Febco, Wilkins, Ames). Find this information on the device tag or body.
COMMON MISTAKE: Guessing or entering a distributor's name instead of the actual manufacturer, which can cause issues if the model needs to be verified against approved assemblies list.
ApronPrep auto-fills 33 of 40 fields from a single compliance interview — no re-typing, no guessing what the government expects.
Top 5 Backflow Prevention Device Certification Mistakes
1. Submitting an Uncertified or Non-Compliant Tester's Report
Using a test report from a contractor not certified by the Detroit Water and Sewerage Department (DWSD) is an immediate rejection. The DWSD maintains an approved list of licensed Backflow Prevention Assembly Testers (BPATs). A report signed by an uncertified tester adds 2–3 weeks to your timeline, as you must locate an approved tester, schedule a re-inspection, and resubmit. Always verify your contractor is on the current DWSD Approved Tester Registry before they perform the test.
2. Incorrectly Listing the Device Location or Water Account Number
Entering a vague device location (e.g., 'near the boiler') or the property owner's personal water account number instead of the commercial utility account number causes administrative delays. The DWSD cross-references the certification with its master plumbing file and water billing system. Be precise: use the exact address and suite/unit number, and provide the 10-digit commercial water account number listed on the building's water bill. Mismatches trigger a manual review, delaying approval by 1-2 weeks.
3. Failing the Initial Test and Submitting the Form Anyway
Submitting a certification form when the attached test report shows the device 'Failed' its initial inspection is a common but serious error. Detroit requires a passing test result for final certification. If the device failed, you must note repairs made and include a subsequent passing test report from the same approved tester. Submitting a failed test adds 4+ weeks, as the DWSD will reject it, and you must coordinate repairs and retesting before restarting the application.
Skip the Paperwork on Your Backflow Prevention Device Certification
ApronPrep auto-fills 33 of 40 fields from one compliance interview.
No credit card required
Backflow Prevention Device Certification by City in Michigan
| City | Fee Range | Timeline |
|---|---|---|
| Detroit | $100 per commercial backflow device for testing and certification (based on Water Works Solutions pricing); additional fees may apply for repairs or recertification. Contact Detroit Water Department for any municipal filing fees. | Testing can typically be completed within 1-2 weeks of scheduling. Initial certification appointment: 1-2 hours. Annual recertification required based on local ordinance (typically annually for commercial). ASSE certification training: 5 days if pursuing in-house certification. |
| Grand Rapids | Contact authority for current fees. Testing fees are charged by certified ASSE 5110 testers; certification filing fees may apply with the city. | Annual requirement. Initial certification typically completed within 2-4 weeks after test submission. Must be renewed annually to maintain compliance. |
| Warren | Contact certified testing provider and Warren Local Authority for current fee schedule. Typical commercial backflow testing ranges $150-$400 per device annually, plus any required repairs if device fails certification. | Testing appointment can typically be scheduled within 1-2 weeks. Certification document provided immediately upon successful test completion. Allow 2-3 business days for submission processing by local authority. |
Government Filing Fees
- $100 per commercial backflow device for testing and certification (based on Water Works Solutions pricing)
- additional fees may apply for repairs or recertification.
- Contact Detroit Water Department for any municipal filing fees.
Timeline: Varies
Step 1: Identify your backflow prevention device type and assembly on your commercial water connection
Locate the backflow preventer on your water service line, typically where the city water main enters your building or at each cross-connection point (like irrigation systems or boiler feeds). Record the device manufacturer, model number, and serial number from the metal tag. Common assemblies in Detroit are RPZ (Reduced Pressure Zone) or DCV (Double Check Valve) types. Missing or illegible serial numbers cause immediate tester delays.
Step 2: Contact Detroit Water Department or Local Authority to confirm certification requirements and whether your device needs testing/certification
Call the Detroit Water and Sewerage Department (DWSD) Cross-Connection Control Program at (313) 267-8000 or email the Cross‑Connection Control Unit to verify your property's risk classification (Low, Medium, High Hazard) and current certification status. Have your DWSD account number and service address ready. High-hazard facilities (like restaurants with dish machines) typically require annual testing per DWSD Administrative Rules Chapter 13.
Step 3: Hire a Michigan State ASSE-certified backflow prevention tester (ASSE 5110 or ASSE 5130 certified)
Select a tester from DWSD's approved list or the Michigan Department of Licensing and Regulatory Affairs (LARA) database. Confirm their ASSE certification number is current and includes the specific assembly type you have (ASSE 5110 for testers, ASSE 5130 for repair personnel). Get a written quote—testing fees in Detroit range from $75–$200 per device, plus repair costs if needed. Uncertified testers' reports are rejected.
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 Michigan.
ADA Compliance Self-Certification
federal
Alarm System Permit/Registration
local
Annual Report Filing
state
Application for Employer Identification Number
federal
See all co-required forms and how they connect to your compliance dossier.
See All RequirementsProcessing timelines are listed as 'Varies' and depend on inspector scheduling and the volume of pending applications. A successful initial certification hinges on a properly installed device and passing the inspection, which is often a prerequisite for obtaining a Business License (Restaurant). Contact the Detroit Water and Sewerage Department (DWSD) Cross-Connection Control unit to confirm current processing windows, as they manage the program schedule.
The government filing fee for the certification is $100, per the Detroit Water and Sewerage Department's published fee schedule. This fee covers the initial administrative review and inspection. Please note that this does not include the cost of purchasing, installing, testing, or maintaining the physical backflow prevention device itself.
No, certifications cannot be transferred. A backflow prevention device is specific to the water service connection and plumbing configuration at a given address. You must apply for a new certification at your new location, a process similar to the initial application, which also requires coordination with plumbing work that may need its own Building Permit. The $100 filing fee and inspection will apply again.
Backflow prevention devices in Detroit must be tested and re-certified annually by a state-licensed tester. The DWSD Cross-Connection Control Program sends renewal notices, and you must submit a new test report each year. Failure to maintain current certification can result in water service interruption and fines. Not legal advice—verify the exact renewal cycle with DWSD.
A DWSD-approved inspector or licensed tester will verify the device is the correct type (e.g., Reduced Pressure Zone, Double Check Valve) for the site's hazard level, is installed correctly (location, orientation, no by-passes), and is operational. They will perform a functional test to ensure it prevents backflow under simulated conditions. Passing this inspection is required before the DWSD will issue the formal certification, allowing you to proceed with other operational permits.
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 Michigan specifically, we have analyzed compliance dossiers for 3 cities (Detroit, Grand Rapids, Warren), generating Rich FILs (Form Intelligence Layers) with 40 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
- Detroit — Department of Public Works (DPW)
- Grand Rapids — Department of Public Works (DPW)
- Warren — Department of Public Works (DPW)
This Form Is One of 60+ Requirements.
ApronPrep discovers every permit your city requires — including the ones generic checklists miss. Pick your city for the complete package.