(a) All lines of piping receiving the discharge of kitchen sinks or any fixtures discharging greasy waste shall be accessible at all points through cleanouts which shall be placed at all changes of direction and shall be the full size of the pipe which they control. When such lines of piping are washed by discharge of fixtures other than sinks, cleanouts may be placed as otherwise directed in this section. No greasy waste shall discharge into a stack the diameter of which is less than two inches.
(b) Grease traps or interceptors shall be located as close as practical to the fixtures from which they receive discharge. If the interceptor is installed on sub floor level to receive waste discharge from a fixture installed on the floor above, the size of interceptor shall be increased on size to provide against static head and increased velocity of waste water, so as to maintain required efficiency.
(c) All interceptors shall be of approved design and made of approved materials.
(d) Each grease trap or interceptor shall be back vented by means of a ventilated pipe of the same material as required for waste and vent piping installed above ground. The size of back vent pipes shall be in accordance with venting requirements for fixtures; the same to be connected to a main vent pipe directly vented to the atmosphere.
(e) The grease interceptor shall be provided with means for proper evacuation of solids, heavier than water particles, so that no foul odors emanate from the grease interceptor, and no fermentation of intercepted particles of food, bone, animal or vegetable matter can take place.
(f) Before any grease trap or interceptor is installed, the exact type or model of each size of grease trap or interceptor shall first be approved.
(g) No grease trap or interceptor shall be approved or installed which has an efficiency rating of less than ninety percent, based upon a rate of flow of not less than 500 gallons per hour as determined by the foregoing provisions, and any installation not in accordance with the foregoing requirements shall be in violation of these regulations.
(Ord. 36-03. Passed 5-19-03.)