I have an older property on my irrigation maintenance route. It is a rather large commercial property with two newer small timers on culinary water and one older Rainbird ESP on secondary with a pump. They have done in-house maintenance for years and the property has been sold several times and remodeled even more. So, the bottom line is there are a bunch of missing station wires and buried valves. I have one area that is on a doubler with another valve. We have been in every box we could find and can't find it. It waters a planter section in the parking area with some trees in it. I have seen wet grass, so I know it is getting water. The former sprinkler guy never could find the valve and says it takes a long time for the area to have the water come up. The owners are misers and don't want us to spend time chasing the valve. I'd like to double the station at the clock so I can better control the water. Is there any test I can do at the clock to find the station with the doubler so that I can find it and trace the valve? Thanks!