Performance indication device for a filter

A fluid filter assembly comprising:

• a filter housing defining a filter chamber;
• a filter inlet for supplying unfiltered fluid to the filter housing;
• a filter medium positioned within the filter chamber, the filter medium operable to remove contaminants from water flowing through the filter medium;
• a filter outlet for transferring filtered water from the filter chamber;
• and
• a performance indication device positioned adjacent the filter chamber within the filter housing, the performance indication device comprising:
• an inlet and an outlet in fluid communication with the filter chamber;
• a drive gear;
• a water metering device configured for converting the energy of water flowing through the inlet into the rotational energy of the drive gear;
• a gear reduction assembly operably coupling the drive gear to a valve gear, the gear reduction assembly defining a gear ratio such that the rotational speed of the valve gear is reduced relative to the rotational speed of the drive gear by the gear ratio;
• and
• a flow controlling device that is operably coupled to the valve gear, the flow controlling device configured to reduce or terminate the flow of water through the inlet when a target flow capacity is reached.