Triton rubber seated butterfly valves from Henry Pratt Company are used in the water and wastewater industries and conform to AWWA C504 requirements. They are available in sizes ranging from 24 through 162 inches in flanged and mechanical joint ends. The flow-through disc design on 30-inch and larger valves provides more strength with less weight and a greater free flow area that results in lower pump costs. Their E-Lok seat-in-body design allows the seat to be adjusted or even replaced in the field, without dewatering the pipeline. 877/436-7977; www.henrypratt.com.