A water straining system for use in a flushing arrangement for a water
delivery system. The flushing arrangement is connected to a main line of
the water delivery system and includes a discharge valve controlled by an
automatic valve control unit. A filter is positioned in the pipeline of
the flushing arrangement between the main line and the automatic valve
control. The filter acts to prevent debris in the main line from entering
the discharge valve where it could become stuck preventing closure of the
discharge valve.