Designed and optimized for trouble-free operation Orbit s heavy duty 1 inch in-line sprinkler valve combines the latest in innovation to create a workhorse valve for residential sprinkler systems. Orbit s automatic irrigation valve has an easy access screw-top lid. Its simple and dependable design includes manual operation and a standard 24-volt solenoid for connection to an irrigation timer. The Orbit Irrigation 1 Male national threaded valve does not require tools to service it.