A lockable assembly for a urinal valve is provided. The lockable assembly includes a shaft assembly configured to engage portions of the urinal valve and a housing body configured to connect to the urinal valve and further configured to support the shaft assembly for axial movement. The lockable assembly is configured to allow selective operation of the urinal valve between a flushable state and a locked non-flushable state, wherein in a locked non-flushable state, the shaft assembly is prevented from moving in the axial direction and in a flushable state, axial movement of the shaft assembly urges the shaft assembly into contact with portions of the urinal valve.