How can you identify a clogged irrigation emitter in a drip system?

• A. Emitter makes a whistling sound
• B. Soil near emitter becomes flooded
• C. Reduced flow from the emitter, uneven wetting, or pressure differences; perform a flow test or inspect emitters.
• D. Watering only one plant in a bed

Answer: (C)

A clogged emitter most clearly shows up as reduced water output and uneven wetting, often with pressure differences along the line. Emitters are designed to release a specific flow, so a blockage lowers the actual discharge, leaving some areas drier while others may show unusual wetting patterns due to shifts in line pressure. To identify it, perform a flow test and inspect the emitter for debris or mineral buildup; flushing the line and cleaning or replacing the emitter usually resolves the issue. The other signs—like soil around the emitter being flooded, a whistling sound, or watering only one plant—point to leaks, air/pressure issues, or misplacement rather than a clogged emitter itself, so they’re not as reliable for confirming a blockage.