DEP Annual Compliance
Backflow Prevention Device Testing & RPZ Compliance in NYC
The NYC Department of Environmental Protection (DEP) requires annual testing and certification of backflow prevention devices on most commercial and multifamily properties. These devices — including Reduced Pressure Zone (RPZ) valves, Double Check Valve Assemblies (DCVA), and Pressure Vacuum Breakers (PVB) — protect the public water supply from cross-contamination. Non-compliance is a civil offense: OATH penalties start at $500 per untested device and escalate significantly for ongoing non-compliance.
Austin Plumbing & Heating performs annual backflow prevention device testing, prepares and submits the required DEP annual test reports, and repairs or replaces devices that fail testing. All testing is performed by a DEP-recognized tester employed by a Licensed Master Plumber, and all reports carry the LMP seal.
What is a Backflow Prevention Device?
A backflow prevention device is a plumbing assembly installed on a water supply line that prevents contaminated water from flowing backward into the public water main. NYC DEP requires these devices on any connection where there is a potential for cross-contamination — including irrigation systems, boiler makeup connections, fire suppression systems, and certain commercial process connections.
The most common device types in NYC buildings:
- RPZ (Reduced Pressure Zone) Valve — highest level of protection; required for high-hazard applications
- DCVA (Double Check Valve Assembly) — required for low-to-moderate hazard applications
- PVB (Pressure Vacuum Breaker) — used in irrigation applications
Annual Testing Requirements
Every backflow prevention device subject to DEP regulation must be tested at least once per year by a certified tester employed by a Licensed Master Plumber. The annual test report must be submitted to DEP within 12 months of the prior test filing date — not the calendar year — so testing deadlines vary by device.
What annual testing includes:
- Physical inspection of the device assembly
- Differential pressure testing across the relief valve and check valves (RPZ)
- Check valve seating test (DCVA)
- Pass/fail determination per DEP standards
- Preparation and submission of the Annual Test Report to DEP, signed and sealed by the LMP
Repairs and Replacements
Devices that fail the annual test must be repaired or replaced before the test report can be submitted with a “pass” result. Austin Plumbing performs device repairs — replacing worn check valve internals, fouled relief valves, and corroded assemblies — and installs replacement devices where repair is not viable. All repair and replacement work is filed with DEP as required.
Penalties for Non-Compliance
DEP enforces backflow prevention compliance actively. Failure to test and file an annual report results in a DEP notice and OATH hearing. Civil penalties begin at $500 per device per year for first offenses and can escalate to $10,000 per device for continued non-compliance. Buildings with multiple devices face compounding exposure.
Which Buildings Are Required to Have Backflow Devices?
DEP cross-connection regulations require backflow prevention devices on connections that pose a contamination risk. This includes most commercial buildings, multifamily buildings with boilers, buildings with irrigation systems, and any property with specialized water-use equipment. If your building has had a device installed at any point, annual testing is required regardless of when it was last tested.
If you're not sure whether your building has a device subject to annual testing, call us — we'll check the DEP records and advise.
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Schedule Backflow Testing
We'll pull your DEP records, confirm device status, and schedule your annual test.