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Section 6.2 Shall be deleted in its entirety <br /> Section 6.3 INSTALLATION DETAIL shall be renumbered 6.2 and modified to read as <br /> follows: <br /> A. Assembly Installation <br /> A backflow prevention assembly shall be installed in accordance with the <br /> manufacturer's instructions. <br /> (1) An assembly shall be installed on the owner's side of the water meter prior <br /> to first outlet, unless isolation is used. <br /> (2) Piping connected to the assembly shall not be used for electrical grounding. <br /> (3) Piping connected to the assembly shall be thoroughly flushed before <br /> installing the assembly. <br /> (4) An adequate and permanent method of test water disposal shall be <br /> provided. <br /> (5) A pressure relief valve shall be properly installed and maintained on all <br /> water heating apparatus served by the assembly. <br /> (6) The assembly installation shall be protected from vandalism and freezing. <br /> (7) Adequate support, excluding water lines, shall be provided for assemblies <br /> that are 3" or larger. <br /> (8) If not part of the approved assembly, an approved strainer should be <br /> installed on the inlet side of the assembly prior to the assembly isolation <br /> valve, so that all water must pass through the strainer immediately before <br /> entering the assembly. <br /> (9) An approved blow-off shall be installed on stagnate flow 4-inch or larger <br /> water lines immediately after the assembly, to allow for flushing the <br /> assembly. Four-inch through ten-inch assemblies shall have a blow-off not <br /> less than 2-inches in diameter. Assemblies larger than 10-inch shall have a <br /> minimum 4-inch blow-off Blow-offs installed in vaults shall have piping <br /> into the existing vault drain to prevent splashing. Blow-offs in vaults may <br /> also be routed above grade and away from the vault, however, a self <br /> draining feature must be incorporated to prevent freezing damage to the <br /> blow-off piping. <br /> 12 <br />