Series WWAV

Series WWAV

Wastewater Air Vacuum Valves

The AirPro Max® Series WWAV Wastewater Air Vacuum Valves are specifically designed with elongated valve bodies. The purpose of the elongated bodies is to increase the gap between the float and the mechanical linkage inside and top of the valve body. The valve is designed to perform two critical functions. First, as the line is being filled with water they expel large quantities of air from the pipeline. When air has been completely vented, water enters the valve causing the float to seal tightly against the seat to prevent leakage. Second, when the line is drained, either intentionally or as a result of pipeline breakage, the Air Vacuum Valve responds to the drop in pressure and opens. Air then re-enters the valve and line eliminating the conditions which could lead to a damaging vacuum developing in the pipeline.

Air Vacuum Valves do not open when under pressure to exhaust small quantities of air that may collect at high points during operation of the system. A Series WWAR Air Release Valve is required for this function.


  • Sizes:
    • 2" & 3" NPT
    • 4”, 6”, 8” flanged ANSI Class 125
  • Pressure Rating (See Note):
    • 150 psi
    • Note: Specify when operating pressure will be below 10 psi
  • Standard Materials: 
    • Body and Cover: Ductile Iron ASTM A536 65-45-12 
    • Float: 316 Stainless Steel
    • Internal Trim: 316 Stainless Steel 
    • Seat: EPDM
    • External Cover Bolts: ASTM F593 316SS
    • Coating: Fusion Bond Epoxy Coating Interior and Exterior