Requirements. In the event that an outside grease interceptor is not practicable, a grease trap(s) shall be required on waste lines leading from kitchen floor drains, mop sinks, food preparation and washing sinks, and other fixtures or equipment where grease may be introduced into the sewer system. FSEs that have grease traps or that are required to install them, are subject to the requirements below:
1. The grease trap may be set on the floor or partially or fully recessed in the floor to suit piping and structural conditions. Baffle systems and all other internal pieces shall be removable to facilitate cleaning and replacement, but must be in place at all other times.
2. There shall be sufficient clearance for the removal of the trap cover for cleaning. The trap shall be equipped with a flow control fitting. A suitable flow control fitting shall be installed ahead of each trap in the waste line beyond the fixture and as close as possible to the underside of the lowest fixture. When wastes of two or more sinks or fixtures are combined for use by one grease trap, a single flow control fitting shall be used. All grease traps shall have a vented waste line to retain water and prevent siphoning.