TORO CO M/R IRRIGATION L7010 Anti-Siphon Valve, 1-Inch 1" Inch Automatic Anti-siphon Valve Valve Features Flow Control, And Both Internal, And External Bleed Flow Control Allows For Fine Tuning Of The Amount Of Water Pressure Going To Each Individual Zone Reducing Misting And Fogging At The Sprinkler Jar-top Bonnet For Easy Access To Diaphragm For Quick Maintenance Inspections Made from corrosion-resistant PVC