A faucet-mounted filter platform for use in a faucet-mounted water filter system, the platform comprising: a) a body forming a fluid chamber having a water inlet; b) a quick connect device for mounting the filter system to a water faucet such that the water inlet is placed in fluid communication with the water faucet, the quick connect device positioned adjacent the water inlet along the body; c) a filtered water flow path disposed within the body and in fluid communication with the water inlet; d) an unfiltered water flow path disposed within the body and in fluid communication with the water inlet; e) a diverter valve disposed within the fluid chamber and operable to open and close the filtered and unfiltered water flow paths; f) an actuator engaging the diverter valve to open and close the filtered and unfiltered water flow paths; and g) a flow meter comprising a flow meter housing connected to the body, the flow meter is positioned outside of the body and in fluid communication with the filtered water flow path, characterized in that the quick connect device comprises: (i) an opening within the body for receiving a male portion of an adaptor; (ii) a first locking device movable between a first position and a second position within the body, the first locking device extending partially around the circumference of the opening; (iii) a second locking device disposed substantially opposite the first locking device and movable between a first position and a second position within the body, the second locking device extending partially around the circumference of the opening; (iv) first and second springs biasing the first and second locking devices into the first positions wherein the first and second locking devices protrude into the opening when in the first positions; and (v) first and second quick connect actuators operable to cause the first and second locking devices to move against the force of the spring to the second positions wherein the water inlet is coaxially disposed within the opening. a) a body forming a fluid chamber having a water inlet; b) a quick connect device for mounting the filter system to a water faucet such that the water inlet is placed in fluid communication with the water faucet, the quick connect device positioned adjacent the water inlet along the body; c) a filtered water flow path disposed within the body and in fluid communication with the water inlet; d) an unfiltered water flow path disposed within the body and in fluid communication with the water inlet; e) a diverter valve disposed within the fluid chamber and operable to open and close the filtered and unfiltered water flow paths; f) an actuator engaging the diverter valve to open and close the filtered and unfiltered water flow paths; and g) a flow meter comprising a flow meter housing connected to the body, the flow meter is positioned outside of the body and in fluid communication with the filtered water flow path, (i) an opening within the body for receiving a male portion of an adaptor; (ii) a first locking device movable between a first position and a second position within the body, the first locking device extending partially around the circumference of the opening; (iii) a second locking device disposed substantially opposite the first locking device and movable between a first position and a second position within the body, the second locking device extending partially around the circumference of the opening; (iv) first and second springs biasing the first and second locking devices into the first positions wherein the first and second locking devices protrude into the opening when in the first positions; and (v) first and second quick connect actuators operable to cause the first and second locking devices to move against the force of the spring to the second positions