Irritrol KD6-INT Zone 4 Stuck On: Valve Diaphragm or Solenoid Plunger

Zone 4 Runs Continuously, Even in OFF; Other Zones Low Pressure

Zone 4 valve stuck open. Causes pressure drop for other zones.

Causes

• Diaphragm failed — won't seal.
• Solenoid plunger stuck up.

Fix

Rebuild or replace Zone 4 valve. See irrigationtutorials.com for guide.