Water main replacement in NYC typically follows a similar timeline to sewer replacement. The permit process takes 2-4 weeks for standard projects. The physical replacement work usually takes 2-4 days for a standard residential water main. This includes excavation, pipe removal, new pipe installation, connection to the city main, testing, and backfill. Street restoration adds 1-2 days. Emergency water main replacements can be completed in 1-3 days with expedited permits. The total timeline from initial contact to completion is typically 3-5 weeks for planned replacements.