NYC building codes regulate every aspect of water main installation and replacement. Requirements cover pipe materials (copper or ductile iron for most applications), minimum pipe sizes, depth of burial, backflow prevention, meter placement, and connection to the city water main. All water main work requires DEP permits and must be performed by a licensed plumber. The code also addresses water pressure requirements, fire protection connections, and cross-connection control. Sewer & Water Pros ensures all our water main work meets or exceeds current NYC building code requirements.