Water filtration guide
How Does CUCKOO 6-Stage Filtration Work?
Understand the main filtration roles and why six stages do not always mean six separate filter cartridges.
CUCKOO filtration setups vary by model. Several current water purifiers use six filtration stages arranged across three or four filter groups, so check the exact specification and care schedule for the model you are considering.
The main roles in a 6-stage setup
The names and arrangement vary, but these are the common filtration roles listed across current CUCKOO models.
Targets visible particles first
A sediment filter is designed to help reduce dirt, rust and larger particles before water reaches later filter stages.
Supports taste and odour reduction
Pre-Carbon Block 2.0 or a Carbon Composite Filter is used in selected models to help reduce chlorine-related taste, odour and certain substances.
Part of selected filter systems
Models such as King Top 2 use a Natural 2.0 Filter as part of their listed multi-stage filtration arrangement.
Final model-specific filtration
Nano Positive, Nano Positive Plus or Nano Positive Plus 3.0 filters are used depending on the purifier model. Performance varies with source water and filter condition.
Why the setup differs between models
Compare the named filters and replacement intervals on the individual product page rather than assuming every six-stage system is identical.
These models list Sediment, Pre-Carbon Block 2.0, Natural 2.0 and Nano Positive filters within a six-stage system.
Grande uses a three-filter, six-stage setup with Sediment, Carbon Composite and Nano Positive Plus 3.0 filters.
Replacement intervals vary by filter and model. Follow the current care schedule and confirm what is included in the selected package.
Related CUCKOO guides
How Does CUCKOO 6-Stage Filtration Work? FAQs
Does six-stage filtration mean six separate filters?
Not necessarily. Multiple filtration stages can be arranged within fewer filter cartridges or filter groups. Check the specific model configuration.
Do all CUCKOO water purifiers use the same filters?
No. Filter names, grouping and replacement intervals differ. Grande, for example, uses a different three-filter arrangement from King Top 2.
Can filtration performance vary?
Yes. Performance can vary with source water quality, pipe condition, filter age, usage pattern and environmental conditions.
Where can I find the filter schedule for a model?
Review the product specifications and confirm the current CUCKOO care or filter schedule for the plan you are considering.