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(B) To eliminate existing connections between drinking water systems and <br />other sources of water that are not approved as safe and potable for human <br />consumption; <br />(C) To eliminate cross -connections between drinking water systems and <br />sources of contamination; and <br />(D) To prevent the making of cross -connections in the future. <br />(2) It is unlawful to make or maintain, for any period of time whatsoever, any <br />cross -connection between plumbing pipes or water fixtures being served with water by <br />the agency and any other source of water supply, or to maintain any sanitary fixture or <br />other appurtenances or fixtures which may cause or allow backflow of water or other <br />substances into the water supply system of the city and/or the service of water pipes or <br />fixtures of any customer of the city. <br />(3) No water service connection to any premises of a type specified in <br />subsection (i) of this section shall be installed or maintained unless the public water <br />supply is protected as required by applicable state regulations and this section. <br />(c) Approval. <br />(1) Each backflow preventer required hereunder shall be approved by the <br />agency prior to installation and shall be installed by and at the expense of the customer <br />for continued service or before a new service will be granted. <br />(2) The agency shall approve a device when the device has received <br />approval by the Foundation for Cross -Connection Control and Hydraulic Research of <br />the University of Southern California (or other qualified organization as designated by <br />the agency), and will provide desired service and reliability. The agency shall provide, <br />upon request, to any affected customer, a list of approved devices. <br />(d) Installation. <br />(1) Devices shall be installed as close as practical to the customer's service <br />connection and shall be installed above grade in an accessible location approved by the <br />agency. <br />(2) Devices shall have at least the same cross-sectional area as the water <br />meter. In those instances where it is determined that a continuous water supply is <br />necessary, two (2) sets of devices shall be installed in parallel. Where parallel devices <br />are required, the sum of the cross-sectional areas of the devices shall be at least <br />equivalent to the cross-sectional area of the meter. <br />(e) Maintenance, testing, and records. <br />Ordinance No. NS -2921 <br />Page 24 of 57 <br />