Permits are required for any legal installations and use of water backflow preventers in New York City.  

The Department of Environmental Protection (DEP) only accepts requests for these permits from licensed plumbers. Requests from the general public are not accepted.

You can get relevant applications, test reports and exemption forms online.

Learn more about cross connection control and water backflow prevention.

Learn about special instructions for water and sewer permits.

  Was this information helpful?   Yes    No