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Water supply pipe to plumbing fixtures, water using appliances and equipment, wall hydrants (except fire hydrants used for fire fighting) and hose bibbs shall meet the following requirements:
1. No plumbing fixture shall be installed unless the water supply enters said fixture with an air gap of twice the internal diameter of the water supply pipe but not less than 1 inch (25 mm) above the flood level rim of the fixture, except for fixtures listed in Section 18-29-423 of this article.
2. Dishwashing machine and clothes washing machine water supply pipes shall have an air gap as required for plumbing fixtures, except that dishwashing machine water supply pipes may enter through an approved atmospheric vacuum breaker located on the discharge side of the last control valve. The bottom of the vacuum breaker shall not be less than 6 inches (150 mm) above the flood level rim of the machine or related equipment.
(Amend Coun. J. 11-9-16, p. 36266, § 37)
The water supply for hospital fixtures shall be protected against backflow with a reduced pressure principle backflow preventer, an atmospheric vacuum breaker, or an air gap. Vacuum breakers for bedpan washer hoses shall not be located less than 5 feet (1525 mm) above the floor.
See Article 2 for definition. For materials for secondary water refer to Table 18-29-605.5, Water Distribution Pipe.
No secondary water shall overflow or be discharged into any surge tank, storage tank, or reservoir, or shall in any way be piped or conveyed into the water supply system or into any building, structure, or premises, such that the overflow or discharge contaminates the fresh water supply from the mains of the Chicago Waterworks System either inside of the premises or in the water service pipe. Secondary water shall not be piped to or used in any plumbing fixture, or for cooling crushers, rollers, or mixers where foods, candies, liquids or materials are manufactured for human or animal consumption.
In accordance with Section 11-8-390 of this Code, the installation of any potable water supply well after May 14, 1997 is prohibited except as otherwise permitted in that section.
(Amend Coun. J. 3-27-02, p. 82090, § 3)
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