DIG’s 1/2 in. Air Vacuum Relief Valve with male pipe thread delivers optimum performance and increased efficiency to a drip system by preventing back-suctioning of debris into the drip line. The valve allows air to escape the drip line during the system’s initial start and until the pipe or drip line is full of water. It also allows air to enter back into the drip line when the drip zone is turned off.
The relieve valve helps prevent clogging in sub-surface drip irrigation systems resulting from the back-suctioning of debris under vacuum conditions. Install it at the highest point of a drip line installation. Install the Air Vacuum Relief Valve after the drip zone, along the drip line laterals, and at the highest point in the drip system layout. Install one relief valve per zone or per each 10 GPM (33 LPM).