Comply with New York City DEP/DOB grease interceptor installation and maintenance rules for a food service establishment

Steps

1. Confirm applicability using the NYC Plumbing Code's Chapter 10 traps/interceptors/separators provisions (edition currently adopted by the NYC Department of Buildings) to determine which kitchen fixtures require a grease interceptor or automatic grease removal device
2. File for a plumbing permit for new grease interceptor installation through the NYC Department of Buildings; confirm the filing must be made by a Licensed Master Plumber (LMP), since only LMPs (or Licensed Master Fire Suppression Contractors, where applicable) may file NYC plumbing permits
3. Confirm whether replacement or upsizing of an existing interceptor also requires a new DOB permit — this is generally required when the work changes the drain connection or the device's physical location
4. Maintain the interceptor per NYC DEP rules under Title 15 of the Rules of the City of New York, cleaning it before accumulated FOG and solids reach the jurisdiction's percentage-of-depth threshold (commonly cited around 25%) rather than waiting for a fixed calendar date alone
5. Consult NYC's published Best Management Practices document for non-residential FOG discharges (available via nyc.gov/dep) for specific BMP and discharge-prevention obligations tied to the sewer-use rules
6. Retain maintenance and pump-out records on-site to demonstrate compliance during a DEP inspection