This shower volume control valve from Westbrass is an excellent water-saving and safety device for your bathroom. Simply attach the valve between the shower arm and head and turn the nozzle to reduce or increase the water flow. Whether you want to save water by reducing the flow when you''re shampooing, shaving, or otherwise occupied, or you want to take extra steps to reduce the risk of scalding in uncertain water temperature situations, this item is a perfect fit. Available in a variety of stylish finishes, this item is sure to complement your existing fixtures.