623V-2203 2 INCH NPT Pressure Vacuum Vent

623V-2203 Pressure Vacuum Vent are installed on the top of vent pipes from underground or above ground fuel storage tanks. The vent cap and internal wire screen are designed to protect the tank vent lines against intrusion and locate form water, debris or insects. A normally closed poppet in the valve opens at a predetermined pressure or vacuum setting to allow the tank to vent.