Abstract: A device (10) for dispensing a metered amount of liquid from a pressurized source of liquid (100) having a storage container (12), a valve (30) and a metering system. A plunger (16) is slidably mounted in the inner chamber (12D) of the storage container. The metering system includes a dosage ring (26) with a pin (28). The ring mounts on the outer surface of the storage container adjacent a dosage slot. The pin extends through the slot in the sidewall (12C) of the container and into a slot in the sidewall (16C) of the plunger. The pin contacts the bottom end of the slot in the plunger to stop the forward movement of the plunger during dispensing of the liquid stopping the movement of the plunger and stopping the movement of the liquid out of the storage container through the valve and out of the nozzle (40).