(A) General. If an outside grease interceptor is not practical, an under the sink grease interceptor may be installed subject to the approval of the Public Works Director. In addition to the general requirements for grease interceptors as provided in this chapter, under the sink grease interceptors shall be subject to the following additional requirements.
(B) Under the sink requirements.
(1) Under the sink interceptors shall be located within 25 feet of the wastewater source and as close to the wastewater source as is reasonably possible.
(2) The lid shall be secured to the body with a single bolt. No wing nuts or screws shall be permitted.
(3) Baffle systems and all other internal pieces shall be removable to facilitate cleaning and replacement, but must be in place at all other times.
(4) The lid shall cover the deep seal interceptor. The deep seal interceptor shall be constructed so as to eliminate the possibility of sewer gas entering the kitchen area.
(5) The interceptors shall be constructed with bottom supports so that the body of the interceptor does not corrode by coming into contact with the floor.
(6) The interceptor shall be coated with a powder coated electrostatically applied cathodic epoxy coating so as to be resistant to corrosion.
(7) The interceptor shall be equipped with a flow control fitting.
(C) Installation requirements.
(1) The interceptor may be set on the floor, partially recessed in the floor with top flush with the floor, or fully recessed below the floor to suit piping and structural conditions, as acceptable to the Public Works Director.
(2) There shall be sufficient clearance for the removal of the interceptor cover for cleaning.
(3) Unless specifically approved by the Public Works Director, runs of pipe exceeding 25 feet between fixture and interceptor shall not be permitted.
(4) The interceptor shall not be installed in a waste line from a garbage grinder. Any garbage grinder waste shall bypass the interceptor.
(5) A suitable flow control fitting shall be installed ahead of the interceptor 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 to be used by one interceptor, a single flow control fitting shall be used.
(6) Air intake for flow control either shall terminate under the sink drain board as high as possible to prevent overflow, or shall terminate in a return bend at the same height and on the outside of the building.
(7) To retain water and prevent siphoning, all interceptors must be a vented and sized in accordance with the applicable Plumbing Codes.
(8) With the approval of the Public Works Director, one interceptor may be used to serve multiple fixtures if the fixtures are located close together and the interceptor is sized to meet the combined flow of all the fixtures.
(Ord. passed 8-3-2010) Penalty, see § 52.99