1605.3 Cross-Connection Inspection and Testing. An

initial inspection and test in accordance with Section 1602.5 shall be performed on both the potable and rainwater catchment water systems. The potable and rainwater catchment water systems shall be isolated from each other and independently inspected and tested to ensure there is no crossconnection in accordance with Section 1605.3.1 through Section 1605.3.3.

(5) The potable water system shall then be completely

drained. (6) The rainwater catchment water system shall then be

activated and pressurized.

When rainwater is not available for the initial test, a temporary connection to a potable water sup- ply shall be required. At the conclusion of the test, the temporary connection to the potable water sup- ply shall be disconnected. (7) The rainwater catchment water system shall remain

pressurized for a minimum period of time specified

(9) The drain on the potable water system shall be

checked for flow during the test and at the end of the period. (10)Where there is no flow detected in the fixtures which

would indicate a cross-connection, the potable water

activated and pressurized.

(7) The rainwater catchment water system shall remain

pressurized for a minimum period of time specified by the Authority Having Jurisdiction while the potable water system is empty. The minimum period the potable water system is to remain depressurized shall be determined on a case-by-case basis, but in no case shall that period be less than 1 hour. (8) Fixtures, potable and rainwater catchment, shall be

tested and inspected for flow. Flow from a potable

1605.3.1 Visual System Inspection. Prior to commencing the cross-connection testing, a dual system inspection shall be conducted by the Authority Having Jurisdiction and other authorities having jurisdiction as follows: (1) Pumps, equipment, equipment room signs, and

exposed piping in an equipment room shall be

(8) Fixtures, potable and rainwater catchment, shall be

tested and inspected for flow. Flow from a potable water system outlet shall indicate a cross-connection. No flow from a rainwater catchment water outlet shall indicate that it is connected to the potable water system. (9) The drain on the potable water system shall be

checked for flow during the test and at the end of the

«

(10)Where there is no flow detected in the fixtures which

would indicate a cross-connection, the potable water system shall be repressurized. 1605.3.3 Discovery of Cross-Connection. In the event that a cross-connection is discovered, the following procedure shall be activated immediately: (1) Rainwater catchment water piping to the building

shall be shutdown at the supply source(s), and the

connected.

The potable water system shall be activated and

pressurized. The rainwater catchment water system shall be shut down and completely drained.

(1) Rainwater catchment water piping to the building

shall be shutdown at the supply source(s), and the rainwater water riser shall be drained. (2) Potable water piping to the building shall be shut down at the meter.

(2) Potable water piping to the building shall be shut down at the meter. (3) The cross-connection shall be uncovered and dis connected.

2019 CALIFORNIA PLUMBING CODE 331

NONPOTABLE RAINWATER CATCHMENT SYSTEMS any other purpose or distributed to any other persons or parti es.

(4) The building shall be retested following procedures

listed in Section 1605.3.1 and Section 1605.3.2.

(4) The building shall be retested following procedures

listed in Section 1605.3.1 and Section 1605.3.2. (5) The potable water system shall be chlorinated with

50 ppm chlorine for 24 hours.

(5) The potable water system shall be chlorinated with

50 ppm chlorine for 24 hours. (6) The potable water system shall be flushed after 24

hours, and a standard bacteriological test shall be per

The potable water system shall be flushed after 24

hours, and a standard bacteriological test shall be performed. Where test results are acceptable, the potable water system shall be permitted to be recharged.

332 2019 CALIFORNIA PLUMBING CODE

CALIFORNIA PLUMBING CODE – MATRIX ADOPTION TABLE