Series WWAR

Series WWAR

Wastewater Air Release Valves

AirPro Max® Series WWAR Wastewater Air Release Valves are specifically designed for wastewater having an elongated valve body to prevent the collection of waste in the linkage area of the air valve. Series WWAR valves prevent disruption of service by venting pockets of air that collect at high points in a pipeline. These valves continuously eliminate air from systems by releasing small pockets of air before large air pockets can occur. In many installations lacking Air Release Valves accumulations of air in the pipeline will cause flow to decrease, and power consumption to increase, due to air blocks in the system. Another possible result of excessive air accumulation may be an inexplicable pipeline rupture. These ruptures are often falsely attributed to ground settling or defective pipe. In reality, unusually large air pockets can greatly increase the pressure of normally occurring surges to the point where sudden stops and starts of flow can cause a pipe collapse.


  • Sizes: 2", 3", 4" NPT
  • Pressure Ratings (See Note): 
    • 75 psi
    • 150 psi
    • 300 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 Expoxy Coating Interior and Exterior