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

Stop Sediment Before It Ever Reaches Your Membrane

Every particle of sediment that gets past your pre-filtration is a particle your RO membrane has to deal with — and over time, that extra load shortens membrane life, raises pressure drop, and drives up the maintenance your system needs.

The AXEON SDF-45-2005 is built to take that load off the membrane entirely. Its four-layer, outside-in depth filtration design captures larger particles at the outermost layer and progressively finer particles at each layer in, trapping sediment by size instead of overwhelming a single filtration stage all at once.

That layered approach is what gives it both a higher dirt-holding capacity and a noticeably lower pressure drop than standard spun polypropylene or string-wound cartridges — meaning it filters more, lasts longer, and makes your system work less hard to push water through it (AXEON Part #200640).

Key Features & Benefits

• Four-layer outside-in depth filtration — captures larger particles at the outer layer and progressively finer particles inward, instead of loading one layer with everything at once.
• Higher dirt-holding capacity than standard cartridges — the layer-by-layer design holds more sediment before it needs replacing, compared to spun polypropylene or string-wound filters.
• Lower pressure drop — keeps water moving more freely through the filter, easing the load on the rest of your system.
• 100% pure polypropylene construction — built from surfactant-, binder-, and adhesive-free fibers for clean filtration without introducing contaminants.
• NSF Standard 42 certified and FDA listed — meets recognized standards for materials and performance in water treatment applications.
• Usable as a standalone or integrated filtration stage — works either on its own for particulate reduction or as part of a larger water treatment system.

Who Should Use This Sediment Filter

This filter suits operators of AXEON N-Series systems who need a replacement pre-filter, as well as anyone running a different RO or water treatment setup built around standard 4.5" x 20" sediment filters who wants stronger sediment capture and longer service life ahead of their membrane stage.

Protecting the Rest of Your Filtration System

Think of this filter as the first line of defense for everything downstream of it — every particle it traps is one your membrane never has to handle. Replacing it on a regular schedule, rather than waiting for a noticeable drop in flow or water quality, is what keeps that protection consistent and helps your membrane reach its full service life.

Frequently Asked Questions

How is this different from a standard sediment filter?

Its four-layer, outside-in depth filtration design traps particles by size across multiple layers, which gives it a higher dirt-holding capacity and a lower pressure drop than standard spun polypropylene or string-wound cartridges.

What systems is it compatible with?

It's compatible with AXEON N-Series RO Systems as well as alternative systems that use standard 4.5" x 20" sediment filters.

Can I use it on its own, or does it need to be part of a larger system?

Both — it works as a single stage of filtration for particulate reduction on its own, or as an integrated stage within a larger water treatment system.

Is it certified for water treatment use?

Yes — it's certified to NSF Standard 42 and made from FDA-listed materials.

What is it made from?

It's manufactured from 100% pure polypropylene fibers that are free of surfactants, binders, and adhesives.