Each plumbing fixture shall be separately trapped by a water-seal trap, except as otherwise permitted by this chapter. The trap shall be placed as close as possible to the fixture outlet. The vertical distance from the fixture outlet to the trap weir shall not exceed 24 inches (610 mm). The distance of a clothes washer standpipe above a trap shall conform to Section 18-29-802.4. A fixture shall not be double trapped. An automatic clothes washer or laundry tub shall not discharge to a trap service or a kitchen sink.
Exceptions:
1. Sections 18-29-1002.1.1 through 18-29-1002.10 shall not apply to fixtures with integral traps.
2. A combination plumbing fixture is permitted to be installed on one trap provided that one compartment is not more than 6 inches (150 mm) deeper than the other compartment and the waste outlets are not more than 30 inches (762 mm) apart.
3. Where sinks are permitted to be directly connected in accordance with the exceptions to Section 18-29-802.1.1 and 18-29-802.1.7, a grease interceptor intended to serve as a fixture trap in accordance with the manufacturer's installation instructions shall be permitted to serve as the trap for a single fixture or a combination sink of not more than three compartments where the vertical distance from the fixture outlet to the inlet of the interceptor does not exceed 30 inches (762 mm), and the developed length of the waste pipe from the most upstream fixture outlet to the inlet of the interceptor does not exceed 5 feet (1525 mm). When the developed length exceeds 5 feet (1525 mm), or more than one fixture or receptacle is connected to an interceptor, each shall be individually trapped and vented. All receptors shall be individually trapped and vented. Wastes exceeding 140°F shall be cooled before draining into any grease interceptor or interceptor or catch basin.
(Amend Coun. J. 10-14-21, p. 37722, Art. X, § 1)