The “Valve Selection Guide for Wastewater Treatment Plants” details Red Valve’s total system approach to wastewater treatment. A detailed treatment plant layout illustrates applications for products at every stage, from influent flow through effluent discharge. Large, full-color photos illustrate products in wastewater treatment applications. For more information on the company’s full line of pinch valves, check valves, knife gate valves, pressure sensors, air diffusers and rubber products, contact the company.