18-29-608.8 Identification of potable and nonpotable water.

   In all buildings where two or more water distribution systems (one potable water and the other nonpotable water) or secondary water distribution systems are installed, each system shall be identified either by color marking or metal tags as required by ASME A13.1.

18-29-608.9 Re-utilization prohibited.

   Water utilized for the cooling of equipment of other processes shall not be returned to the potable water system. Such water shall be discharged into a drainage system through an air gap or shall be utilized for nonpotable purposes.

18-29-608.10 Reuse of piping.

   Piping that has been utilized for any purpose other than conveying potable water shall not be utilized for conveying potable water.

18-29-608.11 Painting of water tanks.

   The interior surface of a potable water tank shall not be lined, painted or repaired with any material that changes the taste, odor, color or potability of the water supply when the tank is placed in, or returned to, service.

18-29-608.12 Pumps and other appliances.

   Water pumps, filters, softeners, tanks and all other devices that handle or treat potable water shall be protected against contamination.

18-29-608.13 Backflow protection.

   Means of protection against backflow shall be provided in accordance with Sections 18-29-608.13.1 through 18-29-608.13.6.

18-29-608.13.1 Air gap.

   The minimum required air gap shall be measured vertically from the lowest end of a potable water outlet to the flood level rim of the fixture or receptacle into which such potable water outlet discharges.