The lightweight, point-of-use venturis in the ZH and ZU series combine simple design with great performance. Just connect an air supply hose on one side and the vacuum is ready on the other side. The ZU thin venturis are extremely compact. The immediate response of the ZH and ZU series may be faster than that of the central vacuum systems. Thus, these venturis are often smaller and lighter than the bulky vacuum lines used in central vacuum systems. An exhaust muffler reduces noise from the venturi to a minimum. Available in four nozzle diameters and many port sizes