The Ultimate Star Filter® – Design & architecture
The Ultimate Star Filter® filter is designed as a gravity-fed filtration system based on a rigorously structured multi-layer internal architecture.
Its operation depends on neither electricity nor water pressure. It relies exclusively on a controlled natural flow, optimized to ensure stable performance over time.
This page presents the technical design of the filter: internal structure, materials, flow rate, lifespan and regulatory framework.
A filtration system is only as good as its overall design, not as good as any single component.
1. Principle of gravity filtration
The filter operates exclusively through gravity. Water gradually passes through the different filtration layers under the effect of its own weight.
This principle ensures:
- no active mechanism
- silent operation
- energy independence
- limited mechanical stress
- flow rate stability
Functional simplicity is an engineering choice aimed at ensuring reliability and reproducibility of performance.
2. Multi-layer internal architecture
The design is based on an ordered sequence of complementary materials.
► High-quality NSF® certified activated carbon
The core of the filter consists of an assembly of selected activated carbon for its adsorption capacity.
It acts in particular on:
- chlorine and disinfection by-products
- organic compounds
- undesirable odors and tastes
- certain micropollutants
► Dedicated media for heavy metals treatment
A dedicated layer is involved in the targeted treatment of certain dissolved metals. It complements the action of activated carbon and contributes to the overall capacity of the filter.
► NSF® certified nanofiltration membrane
A nanofiltration membrane provides an additional physical barrier.
It acts on:
- fine particles
- certain microorganisms
- nanometer-sized contaminants
This multi-layer combination integrates: adsorption + chemical interaction + mechanical filtration
Detailed material characteristics and performance are presented on the page performance and composition of the filter.
3. Patented low-temperature compression process
The materials are assembled using a patented low-temperature pressure process.
This choice aims to:
- preserve the internal structure of the adsorbent materials
- prevent the obstruction of active pores
- maintain functional permeability
- ensure a stable flow rate
This process contributes to achieving a higher flow rate than heavily compressed filters, while maintaining a high adsorption capacity.
4. Controlled flow
The flow rate is not maximized but deliberately balanced.
An excessively fast flow would reduce the contact time with the filtration materials.
A flow that is too low would negatively affect daily use.
The balance sought is based on:
- treatment efficiency
- performance consistency
- user comfort
The principle of gravity ensures flow stability over time. The rationale behind a deliberately balanced flow rate is detailed on the page lifespan and flow rate of the filter.
5. Nominal lifespan
Each filter is designed to treat approximately:
- 3,000 liters per unit
- 6,000 liters per pair
This value corresponds to a recommended volume ensuring performance consistent with test conditions.
Analyses have been conducted at several stages, including beyond the nominal volume.
NSF® Certification
The filter is officially registered in the public NSF® database.
The certification governs certain performance and material requirements according to internationally recognized standards.
REACH Compliance
Materials in contact with water comply with the European REACH regulation.
This compliance ensures the absence of substances of very high concern under European regulation.
Independent laboratory analyses
Tests carried out by laboratories accredited ISO/IEC 17025 at different stages, up to 3,200 liters filtered.
Measurement of actual performance and its stability over time.
Technical summary
The Ultimate Star Filter® is based on:
- a self-contained gravity filtration system
- a structured multi-layer architecture
- a manufacturing process that preserves permeability
- a controlled flow rate
- a defined lifespan based on treated volume
- an independent regulatory framework
The overall design aims to ensure stability, reproducibility, and consistent performance over time.
Going further
Learn more
- How gravity filtration works
- Technology and composition of the Ultimate Star Filter®
- Filter lifespan
- Independent laboratory analyses
- NSF® certification
- REACH compliance
Technical FAQ
Does the filter remove naturally occurring minerals from water?
No. Like gravity filters based on activated carbon, it is not designed to remove naturally dissolved minerals present in water.
Why isn’t the flow rate faster?
An excessive flow rate would reduce the contact time with the filter materials. The flow rate is intentionally balanced to preserve treatment efficiency.
What is the difference between NSF® certification and laboratory analyses?
NSF® certification is based on specific regulatory standards.
Independent laboratory analyses measure actual performance at different filtered volume stages.
Are performance levels measured at end of life?
Tests have been conducted at several stages, including beyond the recommended nominal volume. Results are available on the dedicated analysis page.