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The Chicago Plumbing Code

§ 18-29-611

Water Treatment Units.

§ 18-29-611.1 Design.

Drinking water treatment units and filters shall meet the requirements of NSF 42 and NSF 53.

§ 18-29-611.2 Reverse osmosis systems.

Reverse osmosis drinking water treatment systems shall meet the requirements of NSF 58. Waste or discharge from reverse osmosis or other types of water treatment units shall enter the drainage system through an air gap.