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(24-7) Check valves are required where elevation differences may result in low-head • <br />drainage. Check valves may be located at the sprinkler head(s) or on the lateral line. <br />(19) if pr-essur-e di4efenees of more than 101% eeeur- between valved z6fies, a Pressure <br />fegula4ing deviee must be installed on the pressure zene(s), <br />(Ib) All new ICI and multi-family residential landscape irrigation systems must also be <br />designed, installed and operated in accordance with the following requirements: <br />(1) A separate metered water service must be utilized for the landscape irrigation <br />system. <br />(2) Landscape irrigation systems must be equipped with a flow meter sensor that will <br />automatically shut down the irrigation system during excessive water flows. <br />(3) Landscape irrigation systems must be equipped with a freeze sensor that will <br />automatically shut down the irrigation system when ambient temperatures fall below 32 <br />degrees F. <br />(4) An irrigation system evaluation must be conducted at least once per year, and the <br />results of the evaluation shall be provided to the director. <br />(ks) E-All existing landscape irrigation systems must be retrofitted with a rain shutoff device <br />or soil moisture shutoff device by September 30, 2007. <br />(14) Existing ICI and multi-family residential landscape irrigation systems must have an <br />irrigation system evaluation conducted at least once per year, and the results of the evaluation <br />shall be provided to the director. <br />(I)An installer- must apply for and obtain a eitY irrigation system plumbing pefmit b <br />b <br />ied by an b design b main and la4efal piping, head <br />" and hydfattlie ealetflatief?s- 0 <br />8