How to determine whether the filter cartridge of the security filter needs to be replaced?

Check the inlet and outlet differential pressure (the most standard and commonly used method)

Normal operation: Differential pressure ＜0.05MPa, the cartridge can be used normally.

When the differential pressure reaches 0.1MPa: Replace the cartridge immediately.

If the differential pressure rises rapidly and becomes high within a few days, it indicates poor pre-treated water quality, and the cartridge should also be replaced in advance.

Check the outlet water flow

With the inlet pressure kept constant:

If the outlet flow decreases obviously and the water supply cannot meet the demand of downstream equipment, and valve and pipeline problems are excluded, the filter cartridge is clogged and needs replacement.

Check outlet water quality

The outlet water becomes turbid and contains sediment, rust particles.

The downstream RO membrane is frequently clogged with a sharp drop in water production.

This means the filter cartridge is failed, perforated or poorly sealed, and shall be replaced at once.

Judge by service cycle (empirical judgment)

Reference for normal working conditions:

Tap water / pure water system: Replace every 1～3 months.

Surface water, well water and poor water quality: Replace every 2～4 weeks.

For reuse after long-term shutdown: It is recommended to replace with a new filter cartridge directly.

Visual inspection by opening the cover

Open the top cover and take out the filter cartridge:

The surface turns yellow or black, covered with dirt and impurities.

The cartridge is deformed, cracked, shedding powder or softened.

Replace the cartridge directly if any above situation occurs; rinsing for reuse is not allowed.

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