Series WAV

Series WAV

Water Air Vacuum Valves

AirPro Max® Series WAV Air Vacuum Valves are high capacity air venting and intake valves designed to provide two separate functions. First, as the line is being filled with water they allow large quantities of air to be vented from the pipeline. When air has been completely vented, water enters the valve causing the stainless-steel float to rise and seal tightly against the seat to prevent leakage. Second, when the line is drained, either intentionally or as a result of power failure or pipeline breakage, the air vacuum valve responds to a negative pressure and opens, allowing air to re-enter the valve and line preventing a vacuum from forming which could lead to damaging the pipeline.


  • Sizes: 
    • 1/2", 1", 2", 3" NPT
    • 4" through 20" 125 lb or 250 lb ANSI Flanged
  • Pressure Ratings (See Note):
    • 150 psi
    • 300 psi
    • Note: Specify when operating pressure will be below 10 psi
  • Temperature Range: Water to 180°F
  • 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