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| Block-In and Depressuring System (Blocking in the System for Hydrant Repair. Start water flowing from the hydrant that is to be blocked in. (This will flush dirt from the valve seats.) Close the "watch" block valve(s) next to the hydrant on the Ringmain side of the hydrant to be repaired. Allow hydrant to bleed prevent a pressure build up in the system. Disassemble hydrant and repair. ixtra) | |||