Orbit 3/4 Female Thread Atmospheric Vacuum Breaker - Prevent Water Back flow - 51059

The Atmospheric Vacuum Breaker is designed to prevent potential contaminants from entering the main water supply through sprinkler heads throughout an irrigation system. Features and Benefits: With a heavy-cast brass body and the ability to withstand up to 150 psi, the Atmospheric Vacuum Breaker will work reliably for any lawn irrigation sprinkler system or garden sprinkler system.