Activated Carbon Filter Cartridge for Water Pitchers (Dechlorination)

This is a replacement filter cartridge for household water pitchers and portable filter bottles, made by Oltaven. Inside a food-grade PP housing it combines high-iodine coconut-shell granular activated carbon with ion-exchange resin, so one cartridge adsorbs residual chlorine and off-tastes, softens tap water by reducing calcium and magnesium scale, and helps intercept heavy metals such as lead and copper. It is made for appliance brands, water-treatment brands, distributors and private-label sellers who need a finished cartridge rather than loose media.

From Media to Finished Filter

Activated carbon is often described as if the material alone decides the result. In a pitcher cartridge it does not. The same coconut-shell carbon can end up in a fast-draining cartridge that lets water pass almost untouched, or in a slow one that releases fine carbon dust into the glass. What separates the two is how the media is packed and how the housing is formed around it.

Oltaven buys and qualifies media, but what we ship is a finished filter. That means the carbon granule size, the resin bead grade, the ratio in which the two are blended, the density of the fill, the injection-moulded mesh that holds the media in place, and the way the housing is sealed all sit inside one specification. Change any of them and the finished performance changes — efficiency, resistance and capacity move together.

This is why we treat media selection and forming as one engineering task. The media set the ceiling on what the cartridge can remove; the forming decides how much of that ceiling the user actually reaches in a pitcher on a kitchen counter.

What Decides Finished Performance

Media choice sets the ceiling

High-iodine coconut-shell carbon gives a large internal pore volume, which is what makes fast chlorine uptake and odour removal possible. Ion-exchange resin works on a different principle: it exchanges hardness ions and can bind certain heavy metals. Because the two do different jobs, the blend ratio is a design decision, not a fixed recipe. A cartridge aimed at lead reduction carries a different ratio from one aimed mainly at scale and taste, and Oltaven adjusts that ratio per project.

Forming sets what the user feels

Pitcher cartridges run on gravity, so the water has no pump behind it. The precision-moulded mesh has to be open enough for water to seep down at a usable rate, yet fine enough to keep carbon fines inside the housing. Get that balance wrong and the cartridge either trickles or clouds the water. Our moulded strainer design is built for both: an even gravity flow and no black water during use. The housing itself is food-grade PP, and the outer shape can be produced from a customer-specific mould.

Sealing and filling decide consistency

A cartridge that performs well in a sample and poorly in mass production usually has a filling or sealing problem, not a media problem. Controlled fill density and a closed housing keep the media bed from shifting, channelling or leaking fines. This is why Oltaven fills and closes cartridges in cleanroom space rather than treating the housing as simple packaging.

Applications

• Household water pitchers — the core use: dechlorination, taste and odour improvement, and scale reduction for everyday tap water.
• Portable sports filter bottles — the same cartridge format sized for bottles carried outdoors.
• Desktop instant-heating water dispensers — filter components that protect the heating path from scale and chlorine.
• Built-in water-tank filters for capsule coffee machines — compatible with appliance water tanks where chlorine and scale affect taste.

In every case the cartridge is a consumable, so the replacement rhythm and the cost per litre matter as much as the first-use result. OEM buyers usually specify both together.

Technical Specifications

The Oltaven Factory and Certifications

Oltaven has more than 20 years of filtration product development and manufacturing experience, and has been exporting to Europe, the United States, Japan and South Korea for over 20 years. Our OEM/ODM work is the centre of what we do: sizes, structures, media grades, housing materials, logos and packaging can all be customised, and we have developed more than 1,000 filtration solutions to date.

The plant covers 50,000 m², including six cleanrooms totalling 20,000 m², where cartridge filling and sealing take place. Our own laboratory is CNAS-accredited and can issue test reports on filtration efficiency, dust-holding capacity and resistance. The company is certified to ISO 9001, ISO 14001 and ISO 45001, and obtained IATF 16949 automotive quality management certification in 2024. Products meet REACH and RoHS requirements and compliance documents are available.

Quality control runs through IQC, IPQC and OQC at every stage, across multiple automated production lines with monthly capacity in the millions of pieces. The factory is in Zhongshan, Guangdong, China.

OEM/ODM Workflow

1. Brief — you share the target device or bottle, the function priority (chlorine, scale, lead), and the market's labelling requirements.
2. Specification — we agree media grade, carbon-to-resin ratio, housing geometry and fill density, and quote against them.
3. Sample and mould — standard samples for evaluation, or tooling for a customer-specific housing shape.
4. Validation — CNAS-accredited laboratory testing on efficiency, flow and fines release, with a report for your technical file.
5. Packaging — print, language and packaging format confirmed before mass production.
6. Production and QC — IQC, IPQC and OQC checks, then shipment from Zhongshan.

Start a Custom Project

To quote accurately we need a few details: the pitcher, bottle or appliance model the cartridge fits, the size or a drawing, the expected water flow, your operating conditions (source water and typical daily volume), and the order quantity. Send them through our contact page and our engineering team will come back with a specification and a sample plan.