Abstract: There is provided a coupler assembly for dispensing fluid from a compressed fluid source, the coupler assembly comprising a chamber, an inlet port, the inlet port comprising a releasable member to be connected to a hose originating from a compressed fluid source, the releasable member comprising a valve, the inlet port further comprising a receiving member for receiving the releasable member, the receiving member being in fluid communication with the chamber, an outlet port in fluid communication with the chamber and a fluid control mechanism operatively coupled to the chamber for controlling an amount of fluid dispensed from the inlet port to the outlet port.