Toro L2010 Automatic Valve Adapter, 1"Valve adapter easily converts manual plastic valves to automatic operation. internal bleed to turn the valve on at the manifold location for system check ups or for extra watering, and manual flow control which allows for fine tuning of the amount of water pressure going to each individual zone reducing misting and fogging at the sprinkler and therefore saving water. Converts manual valves, to automatic operation Features manual internal, and external