The Catenary Bar Screen from E & I Corporation, A Div. of McNish Corporation, is used for the screening of solids from the influent of wastewater treatment plants. It is a heavy-duty, reliable and easy-to-maintain unit for the protection of pumps in stormwater pump stations, especially in low-lying areas. It has since been utilized extensively in both municipal and industrial wastewater treatment plants. Its chain and rakes form a natural catenary loop at the bottom of the screen to eliminate the need for any sprockets or chain guides below the liquid surface. This allows all maintenance to be performed from the operating-floor level. 614/899-2282; www.eandicorp.com.