What Micron Filter Do I Need?

The micron filter you need depends on the equipment you are protecting and the type of debris in the water. A cooling tower, irrigation system, spray nozzle, heat exchanger, and reverse osmosis pretreatment system may all require different filtration levels because each system has different tolerance for suspended solids.

How to Narrow the Choice

• Identify the smallest passage or opening downstream
• Review equipment manufacturer filtration requirements
• Consider whether debris is inorganic, organic, fibrous, or biological
• Account for flow rate and pressure limitations
• Avoid selecting a screen that is finer than necessary

A good rule of thumb is to choose a micron rating that protects the most sensitive downstream component without creating excessive maintenance. For critical systems, water testing or a review of existing debris problems can help confirm the correct screen size.