Why are filters used in irrigation systems?

• A. To reduce pH
• B. To remove debris that can clog emitters, valves, and other components
• C. To add nutrients
• D. To cool water

Answer: (B)

Filters protect the irrigation system by removing debris and particulates from the water before it reaches emitters, valves, and other components. Micro-irrigation emits water through very small passages, so sand, silt, rust, and organic matter can quickly clog those passages. By catching these solids, filters help maintain consistent flow, prevent clogs, reduce maintenance, and extend the life of pumps, emitters, and controls.

Other options don’t fit because filters don’t alter chemical properties like pH, nor do they add nutrients; those need separate treatment. They also don’t cool water. Filtering’s job is to remove solids to prevent physical blockages, not change water chemistry or temperature.