Diagnosing Partial Irrigation System in New Home Purchase

New homeowner finds only front yard (zone 2) works on 4-zone Rain Bird system. Zone 4 sprays from a disconnected 1" black tube. Zones 1 and 3 do nothing. Drip tubing found on both sides of house.

System Analysis

• Zone 2: Front yard sprinklers (working)
• Zone 4: Drip mainline disconnected (black tube with plugged holes)
• Zones 1 & 3: Likely back/side yards—valves may have failed solenoids
• Drip tubing: For pots/small areas—connect to PVC laterals

Troubleshooting Plan

1. Verify each zone has run time programmed
2. Run controller test cycle
3. Locate valve boxes (green lids) by tracing wires from controller
4. Test solenoid voltage at each valve (24VAC when active)
5. Replace failed solenoids (~$9 each)
6. Connect drip tubing to PVC with funny pipe/fittings ($18/50' roll)

Typical 4-Zone Layout

Front, Right Side, Left Side, Back—though installers vary. Download your controller manual from RainBird.com for programming details.