Disclosed is a lever (3) mounted float (9) operated liquid control valve particularly suited for use with animal watering troughs that are typically sited some considerable distance from their water source. The valve incorporates an outlet (8) adapted, such as by groove (8b), to have a detachable conduit coupling connected thereto enabling temporary branches or take-offs to be connected thereto. The outlet (8) is preferably designed to enable coupling with an overcentre cam coupling and is preferably in the nature of a removable cap. In addition locking means (2) are provided enabling the valve to be maintained in a closed mode while the coupling is connected to and disconnected from the valve. The valve is preferably of a type wherein a float lever (3) thereof impinges with a bridging section (5c) of an opening and closing plunger (5) mounted in an associated cylinder of the valve. Further characterising the invention the bridging section (5c) is set-back from the side of the plunger (5) associated with the lever (3). This enables, with removal of the outlet cap (8), the plunger (5) to be displaced sufficiently to provide clearance between the plunger (5) and the lever (3) enabling removal of the plunger (5) without disconnecting the lever (3) from the valve body (1). This facilitates cleaning of the valve. Also the outlet (8) preferably includes a bore (11) with a middle section (11c) between, relative to the middle section (11c), an inner converging section (11a) and an outer diverging section (11b).
