Locate the manufacturer and serial number of your system. You can find this information on the equipment.
Contact the manufacturer to locate a licensed repair technician in your area.
The technician will conduct tests on the system, including testing all of the valves, water supply, nozzles, sprinkler heads and pipes.
Locate the closest fire department, and ask them to inspect your system to make sure any repairs have kept the system up to the fire department's code.