The Rotopuls 30 rotating vibration nozzle from Enz USA is provided with an eccentrically supported rotor, which produces hard vibration impact and pulsating jets. The resulting pulsations become so strong that hard deposits disintegrate. It is safe to use in pipes made of plastic, steel or concrete from 1.5 to 4 inches in diameter. The small size allows for navigating tough bends. It is ideal for cleaning waterless urinals, is available in a 1/4-inch connection and operates on flow as low as 3 gpm. 877/369-8721; www.enzusainc.com.