Single Zone Low Pressure: Check Control Valve, Root Intrusion, and Head Performance

Three Zones; Zone 2 Only Dribbles; Heads Clean

A restriction exists somewhere in zone 2:

• Inspect the control valve for debris or a partially closed flow control.
• Mature trees/landscape may have roots crushing the lateral pipes.
• Check if all heads on zone 2 have equally low pressure or if some are better—uneven pressure suggests a leak or clog downstream.