Click here to enlarge imageTertiary filtrationTertiary filter systems from Leopold are designed and engineered to achieve specific performance requirements of individual wastewater treatment plants. The company provides all components for a complete tertiary treatment system including its Universal® Type S® or Type SL® underdrain, engineered filter media, fiberglass products and filter controls. The filter controls are engineered according to plant layout, upstream conditions and effluent permit regulations.F.B. Leopold Co.Zelienople, PATel: 724-452-6300Web: www.fbleopold.comHorizontal split case pumpsGoulds Pumps, an ITT Industries company, is offering the A-C (Allis Chalmers) Model 9100, a medium capacity, single stage, double suction pump designed for a wide range of municipal wastewater applications, including: high flow, low lift, raw water and wastewater. The 9100 features a double suction impeller to assure hydraulic axial balance in low thrust bearing loads. The in-line suction and discharge flanges in the lower half casing simplifies piping. The upper casing half can be removed for inspection and maintenance. Eleven sizes are available in a variety of metals from cast iron to stainless steel. Capacities range to 12,000 gpm, heads to 850 feet, temperatures to 275°F and working pressures to 400 PSI.Goulds PumpsSeneca Falls, NYTel: 315-568-2811Web: www.gouldspumps.com