(A) Services to single-family residential units, not otherwise required by this code to have other containment devices, may have a containment device in the form of an approved dual check valve on all such services which meters are applied more than 90 days following the date of adoption of this subchapter, the dual check valves or other containment devices as required shall be installed by the owner’s representative prior to the installation of the meter by the GCRWS. On all such services for which meters have been applied prior to that date, the dual check valve shall be installed by the GCRWS provided that the GCRWS reserves the right to charge the owner or occupant of any residence for the cost of the device and its installation. Maintenance of dual check valve containment devices installed in accordance with this section shall be conducted by the GCRWS. Testable containment devices that are required on lawn irrigation water systems and must be tested every three years by a contractor that has been approved.
(B) All other connections to the public water supply of the GCRWS shall have containment devices in the form of a double check valve back flow prevention device as set forth in this section of this code. This shall include water mains installed to the GCRWS standards, and with the GCRWS supervision, but which are not maintained by the GCRWS including, but not limited to, manufactured home parks, apartments, group housing projects, and other private distribution systems, or similar hazard potential as determined by the Public Works Director, or his or her authorized representative. Private distribution systems shall be configured so as to provide looped mains, with two or more containment devices on each building water service connection and at deadend branch mains.
(Ord. passed 6-21-04)