Make finding and repairing broken irrigation valve wires a thing of the past. From the makers of DOUBLER now comes DOUBLER2 (aka DOUBLER Squared). DOUBLER2 allows independent control of up to four automatic valves with only one valve wire and the common. When DOUBLER2 is connected to the station hot wire coming from the controller, it switches when the station is turned on and passes the electrical current to the first valve. The next time the DOUBLER2 receives power it switches to the second valve and so on until it has progressed through it's four outputs. Simply connect jumper wires in your controller to the 4 stations you would like to control your valves and set time on each station. If only two stations in your controller are available you may also use another program to run the additional valves. It simply uses the one set of wires up to 4 times. Each valve will water for as long as the time set on the controller.
To bypass a broken wires, connect the DOUBLER2 to the nearest operating valve. Run the existing valve and the additional valves on the good wire using a DOUBLER2 to separate them.
For sprinkler lines with low pressure, add valves to supply some of the heads and run the valves on a DOUBLER2 using the original wire. Also for a sprinkler lines partly in shade and partly in sun or a valves watering both lawn and shrubs.