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18-29-705.5.3  Mechanical joint coupling.
   Mechanical joint couplings shall comply with CISPI 310 or ASTM C 1277 and shall meet the requirements of Factory Mutual Standard 1680, Class I, with a minimum working pressure of 15 psi (103.4 kPa). The elastomeric sealing sleeve shall conform to ASTMC 564 or CSA CAN/CSA-B602 and shall be provided with a center stop. Mechanical joint couplings shall be installed in accordance with the manufacturer's installation instructions.