AAV

  • Air Admittance Valves

    Introduction AIR ADMITTANCE VALVES Air admittance valves use pressure changes to let air enter the drainage system. These one-way valves allow air to move in only one direction. Air entering through an air admittance valve prevents siphonage in the traps. The valve opens only when negative pressure builds up in the plumbing system. Gravity then…

  • Aav Valve for Vent

    Introduction AAV VALVE FOR VENTS AAV Valves are Air admittance valves that deal with the negative pressure building up inside the plumbing systems and prevent the siphonage of traps. Siphonage is filling up of liquid in a container placed in the lower position, thus filling up of the traps. AAV air admittance valves are installed…