The Porta Spreader screening system from ScreenCo Systems doubles as a mobile screening device. Tow the unit behind a vacuum truck to screen out all inorganic debris while land-applying septic or grease trap waste. Its telescopic dump hose flexes up and down and moves in and out while traveling across the field. It has a telescoping and adjustable tongue height, and its 2-inch ball receiver makes it adaptable to virtually all vacuum trucks. It has hinged trash chutes, a powder-coated steel frame and aluminum hopper assembly construction with 2- to 12-inch fan spreaders on the bottom rear. Its 3.8-inch gapped steel screens meet ecology 503s. It has a complete trailer light package and comes with custom cleaning tools. It works with either 4- or 6-inch dump valves, with a capacity of up to 500 gpm. 208/790-8770; www.screencosystems.com.