a device and method restricting water flow from a bathroom fixture is provided herewith . a preferred embodiment of the improved flow restrictor assembly comprises a metallic fitting or housing that accommodates an interior ring assembly and a flow - restrictor disk . the fitting is substantially tubular with a top section , a bottom section and an intersection . the top section of the fitting is defined by an opening , a hollow interior and a ledge upon which the interior ring assembly and flow - restrictor disk are positioned when the flow restrictor assembly is installed and in use . the bottom section features a pair of gripping planes which can be gripped by a specialized tool for purposes of uninstalling the improved flow restrictor assembly .