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Learn how technicians distinguish an underground sprinkler leak from a restricted valve when one zone has low pressure.

Replacing a sprinkler controller will not fix a dead zone caused by damaged wiring, a failed solenoid, splice or valve.

Broken underground sprinkler wiring can often be repaired after electrical testing and wire tracing locate the damaged circuit.

A sprinkler controller can look normal while a field wire, splice, solenoid or valve prevents a zone from operating.

Learn what equipment is used to locate buried sprinkler valves and trace underground irrigation wiring before digging.

What a professional sprinkler diagnostic visit should check, including controller output, wiring, valves, pressure, leaks, heads and coverage.