Does the hydrant shift require the whole system to drain off water?
The specific location depends on the system diagram of the system. If there is no valve or valve failure, the entire system can only work after the water, remember to close the high water tank valve.
Is generally not needed, in the fire hydrant system network, design of the valve, as long as the fire hydrant to be shifted off the corresponding water supply pipe valve can be placed on the realization of local water hydrant maintenance or displaced.
