OP, most irrigation maintenance technicians use the solenoid valves every time they visit to operate the system manually. Obviously, you don't have a maintenance service. Normally, I wouldn't have a service either, but Massey checks my system quarterly for $40 per visit. When I have a broken sprinkler or a leak, they respond quickly and their cost is very nominal, or sometimes there is no charge. If you don't have a service, you may have a problem scheduling someone to come out, and they may charge you a few hundred dollars.
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