Using a Water Meter to Detect Irrigation Leaks After Valve Repair

After replacing a solenoid on a leaking valve, the owner wants to confirm the system no longer leaks using a Hersey water meter with a low-flow indicator (red triangle).

Meter Leak Detection

• Red triangle (leak indicator): Rotates with any flow, typically detecting down to ¼ GPM.
• Test procedure: Ensure all house water is off. Watch the triangle for 2–3 minutes. Any movement = leak.
• Main sweep hand: For larger leaks, the main dial (0–9) will advance.

Valve-Specific Check

Listen at each valve box with the system pressurized but not running. A hissing or gurgling sound at a valve indicates weeping (≈80% detection rate). The meter confirms system-wide integrity; auditory inspection pinpoints the valve.