Backflow Prevention Device Certification in Los Angeles, California (2026)
Without a valid Backflow Prevention Device Certification from the Los Angeles Department of Public Works, your water meter will be tagged for non-compliance and your restaurant risks losing its water service during peak operating hours. The Backflow Prevention Device Certification—also called a backflow device test or annual backflow recertification—verifies that your device prevents contaminated water from flowing backward into the public water system, a violation of California's Safe Drinking Water Act. The Los Angeles Department of Public Works and certified testing professionals administer this requirement.
- 30 fields — ApronPrep auto-fills 25 of them
- $75–$150 in testing and certification fees per device per year
- Annual renewal — must be completed before expiration or face service suspension
- 1–4 weeks to schedule initial certification or annual recertification
Most applicants complete the certification documentation in under 15 minutes with ApronPrep, which auto-fills your device information and connects you to certified testers in Los Angeles.
Analyzed from Backflow Prevention Device Certification
83% from one compliance interview
Manual entry or document upload required
Why You Need a Backflow Prevention Device Certification
The Backflow Prevention Device Certification is mandated under the Los Angeles Municipal Code and enforced by the Los Angeles Department of Water and Power (LADWP) in coordination with the Los Angeles County Department of Public Health. Specifically, LAMC Title 64 (Water and Wastewater) and the LADWP Water Service Rules require any commercial food service establishment — including restaurants, commissaries, and food trucks with fixed connections — to install, test, and certify an approved backflow prevention assembly on their potable water service line. The certification must be performed by a licensed backflow prevention device tester certified through the American Backflow Prevention Association (ABPA) or an equivalent body recognized by LADWP, and results must be submitted directly to LADWP on their prescribed form. This requirement exists because restaurant operations — including high-pressure spray equipment, chemical sanitizers, and carbonated beverage lines — create cross-connection hazards that can contaminate the public water supply if pressure differentials occur.
Operating a food service establishment in Los Angeles without a current, filed Backflow Prevention Device Certification exposes your business to serious regulatory and operational consequences. LADWP and the Los Angeles County Department of Public Health have authority to act swiftly once a violation is identified — and health inspectors routinely cross-check certification status during routine inspections. The consequences of non-compliance include:
- Water service disconnection — LADWP may physically shut off your water supply until a compliant device is installed, tested, and certified, which can force an immediate closure of your restaurant
- Fines and mandatory remediation costs — citations can accrue on a per-day basis for continued non-compliance; contact LADWP to confirm current fine schedules, as amounts are subject to revision
- Permit revocation or hold — the Los Angeles County Department of Public Health may place a hold on your health permit renewal or revoke your existing permit if backflow certification is not current
- Insurance and lease implications — many commercial landlords in Los Angeles require proof of current backflow certification as a lease compliance condition; your general liability insurer may deny claims arising from a water contamination incident if you were operating without a certified device
- Cease-and-desist orders — repeated or egregious violations can trigger formal cease-and-desist action, requiring you to halt operations until full compliance is demonstrated
Legal code: Local sewer use regulations, water connection requirements, road/sidewalk ordinances, grease discharge limits
Recent update: As of 2025, LADWP updated its cross-connection control program to require annual certification submissions to be filed electronically through the LADWP Customer Portal — eliminating the previously accepted mail-in option for most commercial accounts; contact LADWP's Cross-Connection Control Section directly to confirm current submission requirements for your account type. Not legal advice.
Who Needs a Backflow Prevention Device Certification?
| Type | Required | Notes |
|---|---|---|
| Restaurant (Full-Service) | Required | Full-service restaurants connect directly to the municipal water supply for cooking, dishwashing, and ice production, making them subject to Los Angeles Municipal Code § 64.30 and California Health & Safety Code § 116800, which mandate annual backflow prevention device testing for any commercial food establishment with a potable water connection. |
| Bar / Nightclub | Required | Bars and nightclubs use pressurized water lines for glass washers, soda guns, and ice machines — all classified as cross-connection hazards under LAMC § 64.30 — requiring a certified backflow prevention device and annual test report submitted to the Los Angeles Department of Water and Power (LADWP). |
| Food Truck | Not Required | Food trucks operating from a self-contained fresh water tank rather than a direct municipal water hookup are generally exempt from LADWP's backflow certification requirement; however, if a truck connects to a fixed water supply (e.g., at a commissary or permanent vending site), the commissary's backflow device certification covers that connection — confirm your commissary's compliance status before assuming exemption. |
| Coffee Shop / Café | Required | Espresso machines, steam wands, and commercial ice makers create cross-connection risks under California Plumbing Code § 603 and LAMC § 64.30, requiring coffee shops to install and annually certify an approved backflow prevention assembly on the main water service line. |
See which restaurant types need this requirement — and which don't.
See Full Requirements →Field-by-Field Guide (30 Fields)
25 of 30 auto-filledLegal Business Name
textEnter the full legal name of your business exactly as it appears on your California Secretary of State registration or DBA filing — not your trade name or signage name.
COMMON MISTAKE: Entering a shortened trade name (e.g., 'Joe's Tacos' instead of 'Hernandez Family Enterprises LLC dba Joe's Tacos') causes a mismatch with LADWP account records and triggers a manual review.
Water Service Account Number
textEnter your Los Angeles Department of Water and Power (LADWP) water service account number, which appears on your monthly utility bill under 'Account Number' — typically a 10-digit numeric string.
COMMON MISTAKE: Entering the service request number or the meter number instead of the account number is one of the most frequent errors; these are distinct identifiers printed in different sections of your LADWP bill.
Restaurant Facility Address
textEnter the full physical street address of the restaurant location where the backflow prevention device is or will be installed, including suite or unit number if applicable — do not use a P.O. Box.
COMMON MISTAKE: Using a mailing address or corporate headquarters address instead of the actual service location address will cause LADWP to reject the certification because the address must match the metered service point on file.
Primary Contact Phone
textEnter a direct phone number for the person responsible for backflow compliance at this facility — LADWP uses this number to schedule inspections and send test result notices, so avoid general front-of-house lines.
COMMON MISTAKE: Listing a restaurant's main reservation line instead of a manager or owner's direct number can result in missed inspection calls and a lapsed certification status.
Primary Contact Email
textEnter a monitored business email address where LADWP can send annual test reminders, compliance notices, and certification confirmation — must be in standard format (e.g., owner@restaurantname.com).
COMMON MISTAKE: Using a generic or unmonitored inbox (e.g., info@ addresses shared across staff) means critical annual test deadline notices go unread, leading to unintentional lapses in certification.
Backflow Assembly Currently Installed
checkboxCheck this box only if a certified backflow prevention assembly is physically present and connected at your facility's water service connection as of the date you submit this form.
COMMON MISTAKE: Checking this box when an assembly has been ordered but not yet physically installed misrepresents your facility's compliance status and can result in a failed LADWP site verification.
Licensed Plumber Contact for Installation
textIf no assembly is currently installed, enter the name, California contractor license number, and phone number of the licensed plumber contracted to perform the installation — LADWP requires a C-36 (Plumbing) licensed contractor.
COMMON MISTAKE: Listing a handyman or unlicensed contractor instead of a California State Licensed C-36 plumber will cause automatic rejection, as LADWP cross-references contractor license numbers with the CSLB database.
Type of Backflow Prevention Assembly
textEnter the specific assembly type using LADWP-recognized designations: Reduced Pressure Principal Assembly (RP), Double Check Valve Assembly (DC), Pressure Vacuum Breaker (PVB), or Atmospheric Vacuum Breaker (AVB) — your certified tester's report will list the correct designation.
COMMON MISTAKE: Entering a brand name (e.g., 'Watts 007') instead of the assembly type category (e.g., 'Double Check Valve Assembly') is a common error that requires resubmission; LADWP's database categorizes devices by type, not manufacturer.
Assembly Replacement Plan
textIf your existing assembly has failed testing or is no longer on LADWP's approved assembly list, describe your replacement plan including the target installation date, the replacement assembly model, and the name of the licensed contractor performing the work.
COMMON MISTAKE: Leaving this field blank when a failed test result is on file — instead of documenting a corrective action plan — signals non-compliance and can escalate to a formal notice of violation from LADWP.
Assembly Installation Date
textEnter the date the backflow prevention assembly was physically installed at the facility in MM/DD/YYYY format — this date must match the installation record on file with your licensed plumber and the initial test report submitted to LADWP.
COMMON MISTAKE: Entering the purchase date or the permit issue date instead of the actual installation date creates a discrepancy with the certified tester's report, which LADWP uses to verify the device's service history.
ApronPrep auto-fills 25 of 30 fields from a single compliance interview — no re-typing, no guessing what the government expects.
Top 5 Backflow Prevention Device Certification Mistakes
1. Submitting a Test Report from an Uncertified Tester
Los Angeles requires backflow prevention device tests to be performed and signed by a tester certified by the Los Angeles County Department of Public Works or an approved equivalent — a plumber's license alone does not qualify. Submitting a report signed by an uncertified individual results in automatic rejection, forcing you to schedule and pay for a re-test from scratch, which typically adds 2–4 weeks to your timeline. Always verify your tester's certification number against the Los Angeles County Certified Backflow Tester registry before they begin the test.
2. Reporting the Wrong Device Assembly Number or Model
The certification form requires the exact manufacturer model number and assembly serial number as stamped on the physical device — not the model listed on the original installation invoice or a similar model. Mismatches between the device in the field and what's recorded on the form cause immediate rejection, as the reviewing authority cannot confirm the approved device list (USC FCCCHR) status of the unit. Physically read the serial and model number off the installed device at the time of testing; do not copy from old paperwork.
3. Missing or Incorrect Service Address vs. Billing Address
Applicants frequently enter their corporate billing address or mailing address in the 'service location' field instead of the physical address where the backflow device is installed. The Los Angeles Department of Water and Power (LADWP) ties certification records to the specific water service address, so an address mismatch causes the filing to be rejected or routed to the wrong account, adding 1–3 weeks for correction and re-routing. Enter the full street address of the restaurant premises — including suite or unit number — exactly as it appears on your LADWP water service account.
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Backflow Prevention Device Certification by City in California
| City | Fee Range | Timeline |
|---|---|---|
| Los Angeles | Contact authority for current fees - individual certified testers set their own service fees for testing and certification; typically $75-$150 per device per year | Initial installation: 1-2 weeks; Annual certification testing: Can be scheduled within 2-4 weeks; Recertification must occur annually before expiration |
| San Diego | Contact PHCC Academy for current course pricing. Fees typically include textbook, AWWA exam registration, water district registration instruction, and scheduled exam. Annual testing fees charged separately by certified testers. | 6 weeks for certification course completion; typically 1-2 weeks to schedule initial course enrollment; annual recertification testing required thereafter |
| San Jose | $1,250 per student for 40-hour certification course; Contact San José Environmental Services for inspection fees, device certification fees, and annual renewal costs | 40-hour course: 1 week (Monday-Friday); Exam scheduling: 1-4 weeks after course completion; Initial backflow inspection: 2-6 weeks after certification; Full compliance establishment: 6-12 weeks |
Government Filing Fees
- Contact authority for current fees - individual certified testers set their own service fees for testing and certification
- typically $75-$150 per device per year
Timeline: Varies
Step 1: Verify your commercial water connection requires backflow prevention assembly (typically required for restaurants due to grease discharge and cross-connection risks)
Contact the Los Angeles Department of Water and Power (LADWP) or your local water purveyor to confirm whether your restaurant's water service requires a backflow prevention device — most food service establishments do due to potential contamination risks from grease traps and chemical storage. Ask for written confirmation of the requirement, which you'll need for your plumber and records. This step typically takes 1–2 business days via phone or online inquiry.
Step 2: Install a testable backflow prevention assembly on your water line if not already present (must be done by a licensed plumber)
Hire a California-licensed plumber to install a reduced-pressure principle (RPP) backflow prevention device or double-check valve assembly at your water meter or service entrance — the device type depends on your specific water service configuration and risk classification. The plumber must pull a permit from the city of Los Angeles Department of Building and Safety before installation. Installation typically takes 4–8 hours, but permit approval can add 3–7 business days.
Step 3: Locate a Los Angeles County certified backflow tester from the official certified testers list
Search the Los Angeles Department of Water and Power's online certified backflow assembly tester directory or contact LADWP directly at (213) 367-4211 to request a list of testers in your area — only certified testers are legally authorized to perform annual tests and issue certifications. Cross-check testers' credentials and read reviews before selecting; some testers can often schedule within 1–2 weeks, while high-demand testers may have 3–4 week wait times. This step takes 1–3 days of research and outreach.
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 California.
ADA Compliance Self-Certification
federal
Alarm System Permit/Registration
local
Alcohol Server Training Certification (RBS)
state
Application for Employer Identification Number
federal
See all co-required forms and how they connect to your compliance dossier.
See All RequirementsTimeline varies depending on whether you're installing a new device or certifying an existing one, per the Los Angeles Department of Water and Power (LADWP) and the city's plumbing code requirements. Certification typically requires an inspection appointment scheduling (1–2 weeks), the inspection itself (1 day), and then processing of results (3–5 business days). Contact the LADWP or your certified backflow device technician to confirm current scheduling availability in your area.
Government filing fees for backflow prevention device certification range from $75–$150, per the Los Angeles Department of Water and Power fee schedule. The exact amount depends on the device type and whether you're certifying a new installation or an existing device. Note that you may also incur separate costs for the certified device technician's inspection and testing services — contact LADWP to confirm the current fee structure and any additional charges.
No — backflow prevention device certifications are location-specific and tied to the physical address and plumbing system where the device is installed, per Los Angeles plumbing code. If you relocate your restaurant, you will need to install and certify a new backflow prevention device at the new location. You should also verify whether your new location's water service provider has different backflow requirements; consider reviewing your Building Permit application to ensure the plumbing work at your new site complies with all water and sanitation codes.
Backflow prevention device certifications must be renewed annually, as required by the Los Angeles Department of Water and Power and California Title 17, Division 3 (Plumbing Standards). You must schedule an inspection and recertification within 12 months of your last certification date — failure to renew can result in a violation notice and potential service interruption. Set a calendar reminder for your certification expiration date to avoid lapses.
A certified backflow prevention device technician will perform a visual and functional inspection of your device, testing its components to ensure it prevents contaminated water from flowing backward into the public water supply, per LADWP standards. The technician will document the device type, installation date, test results, and any repairs needed, then submit the certification report to LADWP. If the device fails inspection, you must repair or replace it and schedule a re-inspection — factor this timeline into your compliance planning, especially if you're opening a new location and completing a Building Permit process simultaneously.
Los Angeles accepts several device types, including reduced pressure principle (RP) devices, double-check valve assemblies (DC), and atmospheric vacuum breakers (AVB), depending on your water line connection and hazard classification, per LADWP guidelines. Your plumber or certified backflow technician will recommend the appropriate device based on your restaurant's plumbing configuration and water use. Contact LADWP's backflow prevention program or your certified technician to confirm which device type is required for your specific installation.
If your device fails, the technician will identify the failed component (often internal seals, check valves, or relief valves) and recommend repair or replacement, per LADWP procedures. You must correct the issue and schedule a re-inspection within a specified timeframe — typically 10–30 days depending on the severity. Repeated failures or delays in correction can trigger a notice of violation and potential water service suspension; consult your certified technician immediately to understand repair options and costs.
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 California specifically, we have analyzed compliance dossiers for 3 cities (Los Angeles, San Diego, San Jose), generating Rich FILs (Form Intelligence Layers) with 30 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
- Los Angeles — Department of Public Works (DPW)
- San Diego — Department of Public Works (DPW)
- San Jose — Department of Public Works (DPW)
This Form Is One of 60+ Requirements.
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