APCO Single Body Combination Air Valves from DeZURIK can be used for clean or dirty fluids. The venting design provides varied and predictable air flow over a wide range of air release and air/vacuum conditions with low pressure sealing down to 2 psi. The compact design of the ASU combination air valve allows for installation in piping systems with limited space and in vaults with low ceiling heights. A large-diameter air/vacuum disc provides high-volume air flow for rapid venting during pipeline filling and for high volumes of air to enter the pipeline during draining. During normal pipeline flow conditions, the dual-range air release design prevents air buildup and resultant flow restrictions under changing conditions and through the full flow range. The design of the valve keeps it operating on fluids containing grit, solids and grease longer than standard air valves. The valves are suitable for corrosive conditions with a 316 stainless steel body and float and have been certified to meet the NSF/ANSI 61 standard for components used in drinking water systems. 320-259-2000; www.dezurik.com