A. There shall be no cross-connections between reclaimed water or graywater systems and potable water systems. Prior to service, all connections to the reclaimed water system shall be reviewed, inspected, and approved by the Utility’s Backflow Prevention Section.

B. Where both reclaimed water and potable water are supplied to a reclaimed water use area, a reduced pressure principle backflow prevention device (RPA or RPDA) or an approved air gap (AG) separation shall be installed at the potable water service connection to the use area.

C. Where potable water is used to supplement a reclaimed water system, there shall be an air gap (AG) separation, approved and regularly inspected by the Utility, between the potable water and reclaimed water.

D. Premises using graywater systems shall install an RPA at the potable water service connection to the property.

E. Parts, tools, gauges, and/or other equipment required for the maintenance and testing of backflow prevention devices on the reclaimed water system shall not be used on the potable water system. All backflow prevention maintenance and testing equipment for the reclaimed system shall be color-coded purple. ((O)07-21, 03/21/2007)