Specialist 2 micron replacement cartridge
Target PFAS, fluoride and a broad range of chemical contaminants
The Osmio F-Guard is a specialist 4.5 × 10 inch filter cartridge designed for point-of-use, point-of-entry and industrial filtration applications. Its multi-media carbon block combines two activated carbons with zeolite minerals, metal scavengers and activated mineral phosphates.
Advanced multi-media filtration
More than a standard carbon cartridge
The F-Guard uses a composite block engineered for adsorption and contaminant reduction across several media types. Its 2 micron rating also helps capture fine particulate matter while maintaining a low initial pressure drop at the stated test flow.
- Targets PFAS, PFOA, PFOS and fluoride
- Reduces chlorine, chloramine, lead and heavy metals
- Helps reduce VOCs, THMs, pesticides and herbicides
- 2 micron filtration rating
- Suitable for compatible 4.5 × 10 inch housings
2 micron rating
Fine filtration within a specialist composite block.
Fluoride reduction
More than 92% under the stated test conditions.
PFAS reduction
More than 95% reduction stated in the datasheet.
Optimal flow
7.5 litres per minute for the 10 inch cartridge.
Published contaminant reduction
Performance stated in the Osmio technical datasheet
The following figures are manufacturer-published reduction claims for the F-Guard media under the stated test standards and conditions. Real-world performance and cartridge life depend on the incoming water, flow rate, contaminant loading and installation.
PFOA and PFOS
Fluorinated organic acids.
PFAS
Per- and polyfluoroalkyl substances.
Fluoride
Including fluorosilicic acid, sodium fluorosilicate and sodium fluoride.
Chlorine and chloramine
Chloramine tested with a 3 ppm challenge.
Lead
Specialist metal-reduction media.
Heavy metals
Published broad heavy-metal reduction.
VOCs and THMs
Volatile organics and trihalomethanes.
Pesticides and herbicides
Also more than 98% glyphosate reduction.
Pharmaceutical compounds
Referenced against ANSI/NSF Standard 401.
Microplastics
Published reduction under the stated test conditions.
Radionuclides
Published reduction under stated conditions.
Nitrates
Published reduction under stated conditions.
Capacity and flow
Two different capacity ratings for different contaminant groups
The figures below should not be treated as interchangeable. Replace the cartridge when the relevant rated capacity is reached, or sooner if water quality or flow deteriorates.
PFAS and fluoride reduction
Approximately 3,000 US gallons under the manufacturer's stated conditions.
Lead, mercury, chloramine and chlorine
Rated at 5.68 litres per minute, equivalent to 10,700 US gallons at 1.5 GPM.
Check the housing and required flow
Nominal 4.5 × 10 inch cartridge format
The cartridge measures approximately 107 mm in diameter and 241 mm long, with a 34.5 mm internal diameter. Confirm that your housing accepts this format and that the 7.5 L/min optimal flow suits the intended application before ordering.
Technical information
Osmio F-Guard 4.5 × 10 inch specification
| Manufacturer | Osmio |
|---|---|
| Model code | CF1045AHZ |
| Filter type | Multi-media PFAS and fluoride reduction block |
| Nominal format | 4.5 × 10 inch |
| Actual dimensions | 107 mm diameter × 34.5 mm internal diameter × 241 mm long |
| Micron rating | 2 micron |
| Optimal flow rate | 7.5 litres per minute |
| Initial pressure differential | Less than 5 psi at 1.5 GPM |
| Maximum working pressure | 125 psi / 8.618 bar |
| Operating temperature | 0.6°C to 38°C |
| PFAS and fluoride capacity | Approximately 11,000 litres / 3,000 US gallons |
| Lead, mercury, chloramine and chlorine capacity | Approximately 40,504 litres at 5.68 L/min |
| Applications | Compatible point-of-use, point-of-entry and industrial filtration installations |
Manufacturer technical data
View the Osmio F-Guard datasheet
Review the published materials, dimensions, flow data, capacities, reduction percentages and standards information before specifying the cartridge.
Materials and standards
Specialist media with published materials certification
Material requirements
The datasheet states NSF Standard 42 certification for material requirements.
Certified materials
The datasheet states that the cartridge uses NSF 61 certified materials.
Compliant materials
The manufacturer datasheet describes the filter as FDA compliant.
Important: Material certification is not the same as certification of every contaminant-reduction claim. Use the Osmio datasheet for the exact published wording and test references.
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Helpful answers
Frequently asked questions
Does the F-Guard reduce fluoride?
Yes. The Osmio datasheet states more than 92% reduction for several common fluoride forms, with a stated PFAS and fluoride capacity of approximately 11,000 litres for this 10 inch cartridge.
Does it reduce PFAS?
The datasheet states more than 95% PFAS reduction and more than 99% reduction of PFOA and PFOS under the referenced test conditions.
How long does the cartridge last?
There is no single calendar lifespan stated in the datasheet. Capacity depends on the contaminant group: approximately 11,000 litres for PFAS and fluoride, and approximately 40,504 litres for lead, mercury, chloramine and chlorine at the stated flow. Water quality and use can shorten service life.
Will it fit any 4.5 × 10 inch housing?
Do not assume compatibility from the nominal size alone. The cartridge is approximately 107 mm in diameter and 241 mm long with a 34.5 mm internal diameter. Confirm the housing specification before ordering.
Can it be used as a whole-house filter?
Osmio lists point-of-entry use as an application, but the 10 inch cartridge has an optimal flow of 7.5 L/min. Compare this with the property's peak simultaneous demand; a larger cartridge or multi-stage system may be more suitable for higher flow requirements.
Does it soften water or prevent limescale?
No. This is a specialist contaminant-reduction cartridge, not an ion-exchange water softener. It does not remove the calcium and magnesium hardness responsible for limescale.
Friendly expert support
Need help confirming the correct cartridge and housing?
Send us the housing model, a photograph of the existing filter and the required water flow. We will help you check compatibility before ordering.