Plumbing fixtures shall be properly connected to either a public
sewer system or to an approved private sewage disposal
system.
Every plumbing stack, vent, waste and sewer line shall function
properly and be kept free from obstructions, leaks and defects.
Grease interceptors and automatic grease removal devices shall
be maintained in accordance with this code and the manufacturer's
installation instructions. Grease interceptors and automatic grease
removal devices shall be regularly serviced and cleaned to prevent
the discharge of oil, grease, and other substances harmful or hazardous
to the building drainage system, the public sewer, the private sewage
disposal system or the sewage treatment plant or processes. Records
of maintenance, cleaning and repairs shall be available for inspection
by the code official.