The Guardian Air/Vacuum Relief Air Vents are smaller, lighter, and cost effective air vents. The Guardian is suitable for working pressures ranging from 2 PSI to 150 PSI. The 2” Guardian Air/Vacuum Relief Air Vent is ideal for placement places on sloping terrain to prevent collapsing of pipes caused by vacuum when pipe networks drain. The built-in Shrader valve is for measuring local line pressure in the field quickly and easily.
