Chapter 13.16
GREASE TRAPS
Sections:
13.16.030 Installation requirements.
13.16.010 Installation.
An approved type grease interceptor complying with the provisions of DMC 13.16.010 through 13.16.030 shall be installed in the waste line leading from sinks, drains and other fixtures or equipment in the following establishments: Restaurants, cafes, lunch counters, cafeterias, bars and clubs; hotels, hospitals, sanitariums, factories or school kitchens, or other establishments where grease can be introduced into the drainage or sewerage system in quantities that can affect line stoppage or hinder sewage treatment or private sewage disposal. A grease interceptor is not required for individual dwelling units or for any private living quarters. (Ord. 339 § 1, 1956).
13.16.020 Rate of flow.
No grease interceptor shall be installed which has an approved rate of flow of more than 55 gallons per minute. No grease interceptor shall be installed which has an approved rate of flow of less than nine gallons per minute with not less than one-and-one-half-inch inlet and outlet. (Ord. 339 § 1, 1956).
13.16.030 Installation requirements.
The trap shall be set as closely as practicable to the fixtures it serves, and in no case more than 16 inches from the outlet of the fixture. No fixture shall be set unless supplied with sufficient water to flush it. Grease traps inside the building shall be made of lead, copper, cast iron or brass, having an airtight screw cover of at least four inches in diameter, and the discharge from any fixture must not pass through more than one trap before reaching the house drain. All traps shall have cleanouts or be so connected as to be easily removed for cleaning and not placed in an inaccessible position. Washracks or steam cleaning plants shall be provided with a sump; the waste from the sump to be trapped by means of a “T” within the sump. No vent line need be provided. No rack used exclusively for draining oil from crankcases is to be connected to the sewer system. (Ord. 339 § 1, 1956).
13.16.040 Obstructing sewer.
It is unlawful for any person to deposit in any manhole, lamphole, flush tank, sewer opening, drain or ditch, any waste, grease, oil, garbage, rubbish, dead animals, or any substance which will obstruct, or have a tendency to obstruct, the flow of any sewer, drain or ditch, or hinder sewage treatment or private sewage disposal. (Ord. 339 § 2, 1956).