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How do I find theZone valve ?
I have one zone not working and have replaced wiring to known valves but can't find the last (bad) zone valve. System is 30 years old and I bought the house 9 years ago, grass has grown over most cover plates and I have located two but have no idea where the bad one is. Is there a way to find them?
a cable locater can track the zone-valve wiring
These can be rented.. However there is an art and high skill to use them.
I recommend to get an irrigation company tech to come out and trace it