Refill Case 20″ Fat (4.5″ Diameter) – Refillable Filter Cartridge

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Overview

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Upgrade your water filtration setup with our robust 20″ Fat (4.5″ diameter) refill case. Designed for performance and versatility, this refillable filter cartridge allows you to customise your filtration media for the exact water quality challenges you face. Whether used in a residential or commercial setting, it delivers reliability and flexibility.

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Key Features

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• Size: 20″ Fat, 4.5″ diameter – accommodates greater media volume than standard slimmer housings.

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• Material: Durable white polypropylene shell — strong, corrosion resistant and built for long-term service.

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• Refillable: Empty cartridge ready to be filled with your preferred filtration media (activated carbon, KDF, resin, siliphos).

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• Built-in pre- & post-filters: Prevent media loss during use, ensuring safe and clean operation.

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• Universal fit: Compatible with most standard residential and commercial filter housings.

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• Tailored for: Custom water treatment systems; great for when you want to control the exact media mix.

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Specifications

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• Size: 20″ Fat (4.5″ diameter)

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• Colour: White

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• Material: Polypropylene

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• Refillable: Yes

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• Media compatibility: Carbon, KDF, Resin, Siliphos (and other suitable filtration media)

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Benefits

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• Customisation: Unlike fixed cartridges, this refill case gives you the freedom to select your media based on your own water quality needs.

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• Cost-effective: Refill only the media rather than replacing the whole cartridge.

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• High capacity: The “Fat” size accommodates more media volume, extending service life and reducing frequency of replacements.

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• Durability: With a strong polypropylene body, it withstands the conditions present in many water filtration setups.

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• Flexibility: Suitable for both domestic and light commercial water treatment applications.

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Use Cases

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• Ideal for households with high sediment or varied contaminants wishing to customise media (e.g., carbon + KDF).

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• Perfect for water refill shops, bottling plants, or commercial sites where filter media needs differ or change over time.

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• Fits into existing 20″ filter housing infrastructure, making it an easy upgrade for systems requiring larger diameter cartridges.

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Installation & Maintenance Tips

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• Ensure your housing is rated for the 4.5″ diameter cartridge and that O-rings/gaskets are correctly seated.

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• Choose your media based on water test results: e.g., activated carbon for taste/odour removal, KDF for heavy metals, resin for hardness or specific ions.

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• After filling the media and installing the cartridge, flush your system according to the manufacturer’s instructions to remove any residual fines.

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• Monitor pressure drop weekly; if your system shows increased restriction, it may be time to replace or refill the media.

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• House the cartridge in a clean environment. Replace or rinse pre- and post-filters as required to maintain optimal performance.

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Why Choose Puritech

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At Puritech, we specialise in advanced water filtration solutions and supply high-quality components for both home and industrial use. Our products, including this refill case, are backed by expertise, robust manufacturing, and dedicated support. Choose Puritech for reliability and clarity in water treatment.

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FAQ

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Q: Will this cartridge fit my current filter housing?
A: If your housing accepts a 20″ “Fat” format (approx. 4.5″ diameter internal), yes — measure your internal diameter and length to confirm compatibility.
Q: What media should I fill it with?
A: That depends on your water quality goals. Activated carbon is ideal for removing chlorine/taste/odour; KDF is excellent for heavy metals or bacteria reduction; resin or siliphos can target scale, hardness or specific ions.
Q: How often should the media be replaced?
A: It depends on your water usage volume, contamination level, and flow rate. Monitor system performance (flow reduction, pressure drop, taste/odour changes) as indicators.
Q: Is this cartridge suitable for commercial use?
A: Yes — it is designed for both residential and commercial filter housings.
Q: What are the delivery options?
A: We offer next-day delivery (see our delivery policy) for orders placed before the cut-off time.
Q: What if I need technical support?
A: Contact our team at +27 10 020 1600 or via email [email protected] and we’ll help you with installation advice, media choices, and compatibility.