§ 42-70. Location and installation requirements for protective devices.

(a)

Backflow preventers shall be accessibly located, preferably in the same room with the fixture they serve, and in accordance with manufacturer's recommendations. They shall not be installed in pits, confined spaces, or areas subject to flooding. If outside installation is necessary, devices must be protected against freezing.

(b)

Atmospheric vacuum breakers shall be installed with the critical level at least six (6) inches above the highest outlet or the flood-level rim of the fixture they serve and on the discharge side of the last control valve to the fixture.

(c)

Pressure vacuum breakers shall be installed with the critical level at least twelve (12) inches above the highest outlet or the flood-level rim of the fixture they serve.

(d)

Reduced pressure principle backflow preventers and double check valve assemblies shall be installed a minimum of twelve (12) inches above existing ground level or flood level, whichever is greater, in a location easily accessible for testing and maintenance.

(e)

Reduced pressure principle backflow preventers, double check valve assemblies, and pressure vacuum breakers must be tested and certified to meet the standards of the University of Southern California Foundation for Cross Connection Control & Hydraulic Research.

(Ord. No. 6233-06, § 1)

(Ord. No. 6233-06, § 1)