Code: DCVA (building term)
Description: (Double-check valve assembly) - is a backflow prevention device that protects the city water supply from contamination. It uses two check valves in series to stop non-potable water or chemicals from flowing backward into the clean drinking water system.
Practical Meaning: If your property has an irrigation system, fire sprinkler system, or certain cooling systems, DEP may require you to install a DCVA. After installation, you must hire a certified tester to test the device every 12 months. If you skip the annual test, you may receive fines or DEP may shut off your water service.
Where You May See It: You may see this term in DEP notification letters about annual testing requirements, on plumbing plans prepared by your engineer or architect, in DEP violation notices, or on test report forms (such as GEN-215B) submitted by your licensed master plumber.
Why It Matters: DEP requires annual testing of all backflow prevention devices to protect NYC's drinking water from contamination. Missing the annual test can result in ECB violations, monetary fines, or disconnection of your water service. You need a certified tester and a licensed master plumber to complete and file the annual test report within the required timeframe.