An under-sink type water purifier with a water-tap portion connected to a
purified-water outlet of the purifier having a sensor for sensing an
object to issue a signal, and a solenoid valve for starting and stopping
the discharge of purified water from the water-tap portion in response to
the signal. The apparatus is characterized by a control circuit for
opening and closing the valve in response to the signal. The circuit is
provided with at least one of a first timer for opening the valve at every
preset time for a short time, and a second timer for opening the valve for
a short time to permit the water-tap portion to discharge the purified
water therefrom when the purified water remains confined in the purifier
for a predetermined period of time. These timers are selectively used in
operation.
