AXEON SDF-45-2005 Sediment Filter, 4.5" x 20"

Extend Filter Life With a Layered Sediment Cartridge

A single-density sediment cartridge traps particles at roughly the same rate across its whole depth, which fills its outer layer with debris long before the rest of the cartridge is doing much work — and pressure drop climbs as a result. The AXEON SDF-45-2005 uses a four-layer, outside-in graded density design that captures larger particles first and progressively finer particles deeper in, spreading the load across the whole cartridge for higher dirt-holding capacity.

NSF Standard 42 certified, it's sized to the standard 4.5" x 20" format used in AXEON N-Series systems and other sediment filter housings built to the same size (Part #200640).

Key Features & Benefits

• Four-layer, outside-in graded density design — traps particles by size across the cartridge's full depth instead of clogging one layer first.
• Higher dirt-holding capacity — the layered design extends how long the cartridge runs before pressure drop climbs.
• Lower pressure drop than standard cartridges — spreading particle capture across layers keeps flow more consistent as the filter loads up.
• NSF Standard 42 certified — certified to the NSF/ANSI 42 standard covering aesthetic effects like sediment and chlorine taste/odor reduction.
• Standard 4.5" x 20" format — fits AXEON N-Series systems and other filter housings built to the same size.

Who Should Use This Sediment Filter

Facilities running an AXEON N-Series system, or any other RO or filtration setup with a standard 4.5" x 20" housing, that want longer intervals between pre-filter changes are the fit for this depth filter.

About AXEON Water Technologies

AXEON Water Technologies, a WQA-member water treatment manufacturer based in Temecula, California, designs and assembles its filtration components domestically, including sediment filter cartridges like the SDF-45-2005 for its N-Series RO systems and standard housings.

Frequently Asked Questions

How does an outside-in graded density filter differ from a standard cartridge?

A standard cartridge traps particles at roughly the same rate throughout, so its outer surface clogs first and pressure drop climbs quickly. The graded density design in this filter captures larger particles near the outside and finer particles deeper in, spreading the load so the whole cartridge contributes before it needs replacing.

When should I replace this sediment filter?

Replace it when you notice reduced flow or rising pressure drop across the filter stage, which signals the cartridge has reached its dirt-holding capacity. Because it's a depth filter, it typically runs longer between changes than a standard single-density cartridge under the same water conditions.

What does NSF Standard 42 certification cover?

NSF/ANSI 42 covers aesthetic effects in drinking water treatment, including sediment reduction and chlorine taste and odor reduction, verifying the filter performs as claimed under that standard's test protocol. It's a materials and performance standard, not a guarantee against every possible contaminant.

Does this filter fit housings other than AXEON's own systems?

Yes, it's built to the standard 4.5" x 20" sediment filter format, so it fits any housing built to that same size, not only AXEON's N-Series systems. Measure your existing housing before ordering if you're not certain it matches that standard size.

Where does this filter sit in the RO system's filtration stages?

It's a pre-filter stage, positioned ahead of the RO membrane to remove sediment before water reaches the membrane, protecting the membrane from particulate fouling. Keeping this stage fresh extends the working life of the more expensive membrane downstream.