The Zanxis sintered activated carbon rod (Ф32×126 mm) is a coconut-shell carbon block filter element for water purifiers and refrigerators. It reduces residual chlorine, off-flavours and odours, and with built-in ion exchange resin helps soften water and reduce heavy metals such as lead and mercury. It suits household RO systems (as pre- or post-filter), direct drinking machines, double-door refrigerators and commercial coffee machines. This page is written for buyers and engineers who need to confirm parameters, verify samples and sign off on specifications before ordering.
| Item | Detail |
|---|---|
| Product name | Carbon block water filter / CTO filter for water purifiers and refrigerators |
| Core filtration materials | High-iodine-value coconut shell activated carbon + food-grade ion exchange resin |
| Core performance | Softens water and inhibits scaling; strongly adsorbs residual chlorine (bleaching powder); removes colour and odour; reduces harmful heavy metals such as lead and mercury |
| Precision and service life | Uniform microporous structure, high initial flow, high filtration precision without black powder release; large adsorption capacity for long service life |
| Standard size reference (OD × length, mm) | Ф60×130 / Ф62×240 / Ф37.5×75 / Ф38×57 / Ф40×195 / Ф51×127 / Ф32×126 / Ф32×106 |
| Main end applications | Household reverse osmosis (RO) purifiers (pre-carbon CTO / post-carbon T33), direct drinking machines, built-in water filters for double-door refrigerators, commercial coffee machines |
| Customisation | Full OEM/ODM support. Length, diameter and inner/outer diameter ratios can be tooled to match equipment needs; end-cap welding customisation available |
| Quality certification systems | Production base certified to ISO 9001 and IATF 16949; filter materials meet strict drinking-water safety and hygiene standards; quality control backed by a national CNAS testing centre |
Before a sample is approved, several parameters should be agreed in writing. Dimensions: the standard Ф32×126 mm is a starting point; confirm outer diameter, inner diameter and length against your housing drawing. Filtration precision: the microporous structure is uniform and initial flow is high, but the exact micron rating and flow rate at your operating pressure should be verified with a sample test. Adsorption performance: confirm residual chlorine reduction and heavy-metal reduction targets using the test methods relevant to your market. Mechanical integrity: request confirmation that no black powder is released under rated flow. Service life: the adsorption capacity is large, but replacement intervals depend on your feed-water quality and daily volume; a life-test report can be arranged.
The Zanxis carbon rod is formed by sintering high-iodine-value coconut shell activated carbon with a food-grade binder, creating a uniform microporous block. Food-grade ion exchange resin is incorporated to help soften water and reduce heavy metals. The block is suitable as a pre-filter (CTO) or post-filter (T33) in household RO systems, and as the water filter in direct drinking machines, double-door refrigerators and commercial coffee machines. Its compact Ф32×126 mm size fits space-constrained housings, while the standard range covers Ф60×130, Ф62×240, Ф37.5×75, Ф38×57, Ф40×195, Ф51×127 and Ф32×106 mm. Zanxis supports OEM/ODM customisation: length, diameter and inner/outer diameter ratios can be tooled to your equipment, and end-cap welding is available. Because the carbon block does not release black powder, it helps protect downstream membranes and valves.
Zanxis backs this product with a self-built laboratory accredited by CNAS (China National Accreditation Service for Conformity Assessment), which can issue test reports covering filtration efficiency, dust holding capacity and resistance. Quality is controlled through IQC (incoming material inspection), IPQC (in-process inspection) and OQC (outgoing inspection). The production base holds ISO 9001, ISO 14001 and ISO 45001 certifications, and in 2024 the company obtained IATF 16949 automotive quality management system certification. The manufacturing facility covers 50,000 m², including six clean workshops totalling 20,000 m². Products comply with REACH and RoHS environmental regulations, and compliance documents can be provided. With more than 20 years of experience in filtration research and manufacturing, Zanxis has supplied export markets in Europe, the United States, Japan and South Korea for over 20 years, and has developed more than 1,000 filtration solutions. Multiple automated production lines support monthly output of millions of pieces. The company is located in Zhongshan, Guangdong, China.
To move from parameters to a verified sample, please send the following: your device or vehicle model, required size or drawing, target airflow or water flow, operating conditions (pressure, temperature, feed-water quality) and estimated order quantity. Zanxis will respond with a specification proposal, sample lead time and the relevant test reports for your review. Contact our team to start the sample verification process.
Yes. Zanxis has a self-built CNAS-accredited laboratory that can issue test reports covering filtration efficiency, dust holding capacity and resistance. We can also provide compliance documents for REACH and RoHS on request. Please specify the parameters that matter for your application when you inquire.
Sample validation typically starts with a review of your drawing and operating conditions, followed by sample preparation on the production line. Because each request differs in size and test requirements, Zanxis confirms the timeline after receiving your specifications. You can then run bench tests and sign off the sample before mass production.
Zanxis supports full OEM/ODM customisation. Length, diameter and inner/outer diameter ratios can be tooled to match your equipment, and end-cap welding is available. Standard sizes include Ф32×126, Ф60×130, Ф62×240 and others, but custom dimensions are developed based on your device requirements.
MOQ depends on whether the size is standard or custom. For this product, standard models typically start at 1,000–2,000 pieces, while custom sizes may require 5,000 pieces. Zanxis confirms the exact MOQ in the quotation based on your specification and packaging needs.
Sample lead time and mass production lead time are confirmed after the specification is agreed. Zanxis operates multiple automated production lines with monthly capacity of millions of pieces, and schedules are set according to order volume and customisation requirements. Your sales contact will provide a firm timeline with the quotation.
Replacement interval depends on feed-water quality, daily treated volume and the adsorption load. Zanxis can provide life-test reports and recommendations based on your operating conditions during sample validation. For planning purposes, confirm the target capacity with our engineers so the replacement schedule matches your device.
Confirm dimensions (OD, ID, length), filtration precision and flow rate at your operating pressure, residual chlorine and heavy-metal reduction targets, and mechanical integrity (no black powder release). Also agree on end-cap welding, packaging and labelling. Zanxis provides a specification sheet for sign-off before mass production.
Send your device model, required size or drawing, water flow, operating conditions and estimated quantity through our contact page. Zanxis will respond with a specification proposal, sample availability and a quotation. Use the <a href="/en/contact">contact form</a> to start.