18-29-802.1.5 Waste piping.

   Waste piping from aspirators, sterilizers or any other equipment which would produce a partial vacuum by cooling shall discharge to the drainage piping system through an air gap into a waste receptor. The minimum size shall be 1 inch (25 mm) and the maximum length of the indirect waste shall not exceed 15 feet (4.57 m) and shall be provided with cleanouts at every 90 degree turn which are accessibly located. Each indirect waste pipe shall be individually piped to the waste receptor with material that is required by this chapter. Waste receptors serving indirect pipes connected to the above equipment shall be located in the same room. Each waste receptor shall be trapped and vented as required by this chapter. The air gap shall be not less than two times the diameter of the indirect waste pipe.

18-29-802.1.6 Commercial dishwashing machines.

   The discharge from a commercial dishwashing machine shall be through an air gap into a waste receptor in accordance with Section 18-29-802.3.

   Exception: Where the fixture is within 4 feet (1219 mm) horizontally of and located in the same room as a floor drain, the fixture waste pipe may be directly connected on the sewer side of the floor drain trap, provided that the fixture waste pipe is trapped and vented as required by this chapter. No other fixture waste pipe shall be connected between the floor drain trap vent connection and the fixture being protected.

(Amend Coun. J. 10-14-21, p. 37722, Art. VIII, § 1)

18-29-802.1.7 Sinks.

   Sinks used for the washing, rinsing or sanitizing of utensils, dishes, pots, pans or service ware used in the commercial preparation, serving or consumption of food or drink shall discharge indirectly through an air gap to the drainage system. Each well of a multiple-compartment sink shall discharge independently to a waste receptor.

   Exception: Where a sink is within 4 feet (1219 mm) horizontally of and located in the same room as a floor drain, the sink waste pipes may be directly connected on the sewer side of the floor drain trap, provided that the fixture waste pipes are trapped and vented as required by this chapter. No other fixture waste pipe shall be connected between the floor drain trap vent connection and the fixture being protected.

(Amend Coun. J. 10-14-21, p. 37722, Art. VIII, § 1)

18-29-802.2 Materials, joints and connections.

   The materials, joints, connections and methods utilized for the construction and installation of indirect waste piping systems shall comply with the applicable provisions of Article 7.

(Amend Coun. J. 10-14-21, p. 37722, Art. VIII, § 1)

18-29-802.3 Installation.

   Indirect waste piping shall discharge through an air gap or air break into a waste receptor. Waste receptors shall be trapped and vented and shall connect to the building drainage system. Waste receptors shall not be located in a toilet facility, closet, storeroom or any inaccessible space. Indirect waste piping that exceeds 30 inches (762 mm) in developed length measured horizontally or 54 inches (1372 mm) in total developed length shall be trapped. Indirect waste pipes shall not exceed 15 feet (4572 mm) in total length and shall be provided with cleanouts at every 90 degree (1.57 rad) turn.

   Exception: Where a waste receptor receives only clear-water waste and does not directly connect to a sanitary drainage system, the receptor shall not require a trap.

(Amend Coun. J. 10-14-21, p. 37722, Art. VIII, § 1)

18-29-802.3.1 Air gap.

   The air gap between the indirect waste pipe and the flood level rim of the waste receptor shall be not less than twice the effective opening of the indirect waste pipe and not less than 1 inch (25 mm).

(Amend Coun. J. 10-14-21, p. 37722, Art. VIII, § 1)

18-29-802.3.2 Air break.

   An air break shall be provided between the indirect waste pipe and the trap seal of the waste receptor.

(Added Coun. J. 10-14-21, p. 37722, Art. VIII, § 1)