Orbit 5 Conductor x 50' UF/UI Sprinkler Valve Control Wire. This high-grade, 7-strand wire is constructed with a PVC jacket for convenient direct burial. Each wire can handle 1 solenoid valve up to a maximum of 800'. It is 50 feet long and has a thickness of 18 gauge. The wire is color-coded to simplify installation to any sprinkler timer and can be buried underground. It is ideal for use on standard 24-volt activators.