Welcome to HydraTech! I am owner Airik Angles. As a certified technician, I have serviced over 15,000 different irrigation systems from city water, well systems, to even pumping out of a lake. Any service technician can replace a bad sprinkler head, or fix an "obvious" leak, however, if your problem goes beyond that, most will be scratching their head. Troubleshooting an irrigation system is a skill which takes many years of on the job training. A skilled tech will find the problem in half the time which translates into lower labor costs