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Celrith sintered activated carbon filter cartridges are designed to remove chlorine, odours, colour, and heavy metals from drinking water while reducing scale build-up. Made from high-iodine coconut shell carbon and food-grade ion exchange resin, they suit household RO purifiers, refrigerators, water dispensers, and commercial coffee machines. This Ф51×127 model is part of a flexible range that can be customised to your exact dimensions.
Municipal water often carries residual chlorine from disinfection, which gives a noticeable bleach-like taste and smell. Organic matter, colour bodies, and trace heavy metals such as lead and mercury may also be present. In appliances, these contaminants don't just affect taste—they can foul membranes, clog valves, and leave scale that shortens equipment life.
For coffee machines and refrigerators, even small amounts of chlorine or odour can taint the final product. The Celrith cartridge targets these issues at the point of use, combining adsorption and ion exchange in a single sintered stick.
When water contains scale-forming minerals, heating elements and steam boilers accumulate deposits that reduce efficiency and increase energy consumption. Chlorine and organic contaminants can degrade plastic components and rubber seals over time. In RO systems, pre-carbon filtration protects the membrane from chlorine attack, while post-carbon improves taste.
The Celrith cartridge reduces this load by softening water through ion exchange and adsorbing chlorine and organics. The result is less scaling, fewer odours, and longer service intervals for downstream components.
The cartridge is formed by sintering a blend of high-iodine coconut shell carbon and food-grade ion exchange resin. This creates a porous block with uniform micropores that allow high initial flow while maintaining fine filtration. The structure traps sediment and prevents carbon fines from releasing into the water—no black particles.
The ion exchange resin softens water by exchanging hardness ions for sodium, reducing scale formation. It also captures heavy metals like lead and mercury. The activated carbon adsorbs chlorine, off-flavours, and organic pollutants, with a large saturation capacity for long service life.
Celrith offers full customisation: outer diameter from Ф30 to Ф60 mm, any length, and end-cap welding options. Whether you need a standard Ф51×127 or a unique size, we can tool to your drawing.
| Item | Detail |
|---|---|
| Product name | Carbon Block Water Filter / CTO Filter for water purifiers and refrigerators |
| Core filtration materials | High-iodine coconut shell carbon + food-grade ion exchange resin |
| Core performance | Softens water, prevents scaling; adsorbs chlorine (bleach), removes odours and colours; reduces heavy metals such as lead and mercury |
| Precision and service life | Uniform micropores, high initial flow, high filtration accuracy, no carbon fines; large adsorption capacity for long life |
| Common sizes (OD × length, mm) | Ф60×130 / Ф62×240 / Ф37.5×75 / Ф38×57 / Ф40×195 / Ф51×127 / Ф32×126 / Ф32×106 |
| Main applications | Household RO purifiers (pre-CTO/post-T33), water dispensers, side-by-side refrigerator filters, commercial coffee machines |
| Customisation | OEM/ODM supported. Any length, diameter, or ID/OD ratio; tooling to equipment needs; end-cap welding available. |
| Quality certification | 20,000 m² production base certified to ISO 9001 and IATF 16949. Filter media meet strict drinking water safety standards; CNAS-accredited testing centre for quality control. |
This cartridge is used by manufacturers of household reverse osmosis systems, where it serves as a pre-filter (CTO) to protect the RO membrane or as a post-filter (T33) for taste polishing. It is also found in point-of-use water dispensers, side-by-side refrigerators with built-in water filters, and commercial coffee machines that require scale-free water.
Because sizes are flexible, it suits both standard replacement filters and custom-designed appliances. OEM and ODM customers rely on Celrith to match exact dimensions and performance requirements.
Celrith products comply with REACH and RoHS environmental regulations, and we can provide compliance documents upon request. Our manufacturing facilities hold ISO 9001, ISO 14001, and ISO 45001 certifications, and we are IATF 16949 certified for automotive quality management. The 50,000 m² plant includes 20,000 m² of cleanrooms across six workshops, ensuring contamination-free production. Our CNAS-accredited laboratory provides filtration efficiency, capacity, and pressure drop testing, and we issue COA reports with each batch.
With over 20 years of filtration experience, we have developed more than 1,000 filter solutions for customers worldwide. Our multiple automated production lines can deliver millions of pieces per month, and our IQC, IPQC, and OQC processes ensure consistent quality from incoming materials to final shipment. We are located in Zhongshan, Guangdong, China.
To receive a tailored quote, please tell us your device or vehicle model, required dimensions or drawing, flow rate (air or water), operating conditions, and estimated quantity. Our team will respond promptly with specifications, samples, and pricing. Contact us today.
It removes residual chlorine (bleach), odours, colour, organic pollutants, and heavy metals such as lead and mercury. The ion exchange resin also softens water by reducing hardness minerals that cause scale.
Replacement depends on water quality and usage, but typical service life is 6–12 months or around 6,000 litres. Monitor for taste, odour, or flow reduction as indicators.
It achieves over 95% chlorine removal and effectively reduces VOCs, off-flavours, and heavy metals. The sintered structure provides fine filtration without carbon fines.
Yes, Celrith offers full OEM/ODM customisation. Outer diameters range from Ф30 to Ф60 mm, and any length can be produced. End-cap welding and other structural options are available.
Standard models typically require 1,000–2,000 pieces, while custom sizes start at 5,000 pieces. Standard stock ships in 7–15 days; custom orders take 25–35 days.
Yes, we provide 2–5 free samples of standard sizes (you cover shipping). Custom samples may incur a fee, which is refundable against a bulk order. Sample lead time is 3–5 days for standard and 10–20 days for custom.
The production base is ISO 9001 and IATF 16949 certified, and the product complies with REACH and RoHS. Our CNAS-accredited lab provides testing and COA reports for each batch.
Please provide your device model, required dimensions or drawing, flow rate, operating conditions, and quantity via our <a href="/en/contact">contact page</a>. We will respond promptly with a tailored quote.