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The Thesvin activated carbon filter cartridge (lead removal) is a replacement filter for household water pitchers, portable sports bottles, and appliance water tanks. It combines coconut-shell granular activated carbon with ion-exchange resin to reduce chlorine, odours, scale-forming minerals, and heavy metals such as lead and copper. It is intended for OEM and ODM customers who need a filter that fits their existing jug or bottle design and meets drinking-water contact standards.
Fitment starts with the interface between the cartridge and the host device. The Thesvin cartridge uses a food-grade PP housing that is precision injection moulded to match the seat, rim, and water inlet of the pitcher or bottle. The outer dimensions and sealing surfaces are controlled so the cartridge locates firmly without wobble, and the water path is directed through the filter media rather than bypassing it. Because the housing is produced in customer-specific tooling, the shape, inlet/outlet geometry, and locating features can be adapted to your existing product or to a new design.
Inside the housing, a precision-moulded filter mesh retains the carbon and resin while allowing gravity-fed water to pass at a practical flow rate. This mesh also prevents fine carbon dust from escaping into the filtered water, so the cartridge does not release black particles during use. The cartridge is intended for gravity-fed pitchers and bottles; it is not a pressure-driven inline filter. If your device uses a pump or pressurised tank, share the operating conditions so the fitment and media can be reviewed.
For OEM projects, Thesvin supports full custom moulding of the housing. You can specify the external profile, colour, logo, and the way the cartridge seats in the jug. The carbon-to-resin ratio can also be adjusted to prioritise lead removal, scale reduction, or a balance of both, depending on your target water quality and marketing claims. This flexibility is useful when one platform needs to serve several markets with different water hardness or contaminant profiles.
The coconut-shell activated carbon is selected for high iodine value, which gives it a large internal surface area for adsorbing chlorine and chloramine by-products, as well as the earthy, musty, and plastic-like odours that commonly affect tap water. Removing these contaminants improves taste and smell without altering the mineral content that gives water its character. The carbon also captures a range of organic compounds, including some pesticides and volatile organic chemicals, within the limits of the media volume in a pitcher cartridge.
The ion-exchange resin works alongside the carbon. It softens the water by exchanging calcium and magnesium ions for sodium or hydrogen ions, which reduces limescale build-up in kettles, coffee machines, and steam irons. The resin also captures dissolved heavy metals such as lead and copper through selective exchange sites. In a typical household supply, this combination delivers a noticeable reduction in scale and a cleaner taste, while the lead-removal capability addresses older plumbing and service lines that may release lead into drinking water.
Physical filtration is handled by the moulded mesh, which retains sediment, rust particles, and suspended solids that can pass through a jug's coarse pre-filter. The result is clear water with fewer visible particles. The cartridge is not designed to remove microbiological contaminants, and it should be used with water that is already microbiologically safe, as is normal for municipally treated drinking water.
| Item | Detail |
|---|---|
| Product name | Water pitcher filter cartridge (lead-removal type) |
| Core filter materials | Food-grade PP housing + high-efficiency coconut-shell granular activated carbon + ion-exchange resin |
| Core purification functions | Adsorbs chlorine, colour, and odour; softens water (reduces calcium and magnesium scale); captures harmful heavy metals such as lead and copper; retains sediment, rust, and suspended solids |
| Flow and filtration characteristics | Precision injection-moulded filter mesh supports good gravity-fed flow while preventing carbon fines from escaping, so the water does not turn black during use |
| Typical end applications | Household water pitchers, portable sports water bottles, desktop instant-heating dispensers, and water-tank filter components for capsule coffee machines |
| Media ratio and tooling customisation | 100% OEM flexible manufacturing. The activated carbon-to-resin ratio can be adjusted for target lead-removal or scale-reduction needs; housing shape and structure can be injection moulded in customer-specific tooling |
| Quality and safety systems | Produced in the company's 20,000 m² clean workshops; compliant with international water-contact and food-contact safety standards. The company holds ISO 9001, ISO 14001, and IATF 16949 certifications |
Dimensional consistency is the foundation of a replacement cartridge that fits every time. Thesvin operates an IATF 16949 automotive quality management system, certified in 2024, and applies IQC, IPQC, and OQC controls across the production flow. Incoming materials are inspected before release, in-process checks monitor moulding and media filling, and outgoing inspections verify critical dimensions and appearance before packing. For water-contact parts, these checks are supported by the company's clean-workshop assembly environment.
The company's laboratory is CNAS-accredited and can issue test reports for filtration efficiency, dust-holding capacity, and resistance. This means you can request documented performance data for your chosen media combination rather than relying on general claims. Thesvin also holds ISO 9001, ISO 14001, and ISO 45001 certifications, and products can be supplied with REACH and RoHS compliance documentation where required.
Manufacturing takes place at a 50,000 m² facility in Zhongshan, Guangdong, China, which includes six clean workshops totalling 20,000 m². With more than 20 years of filtration experience and exports to Europe, the US, Japan, and South Korea, the company supports OEM/ODM projects covering dimensions, structure, media grade, logo, and packaging. Automated production lines support monthly output in the millions of pieces, and the company has developed more than 1,000 filtration solutions.
To receive a quotation, send us the device or vehicle model, a drawing or sample of the old cartridge, the expected water flow or airflow, your operating conditions (water hardness, pressure, temperature), and the quantity you plan to order. If you do not have a drawing, a photo of the old part with a few key dimensions is enough to start. Contact our team and we will confirm fitment, media options, MOQ, and lead time.
Fitment depends on the seat and inlet geometry of your pitcher. Thesvin produces the housing in customer-specific tooling, so we can match your existing design or create a new one. Send a photo or drawing of your current cartridge with key dimensions, and we will confirm whether a standard housing works or a custom mould is needed.
Yes. An old cartridge is often the fastest way to start because it shows the sealing surfaces, locating features, and overall envelope. We measure the sample and propose a matching housing. Where needed, we can also work from a simple sketch with the main dimensions.
This cartridge is designed for lead removal using ion-exchange resin combined with coconut-shell activated carbon. The exact efficiency depends on the media ratio, contact time, and water chemistry. Our CNAS-accredited laboratory can test your specified configuration and provide a report, so you can verify performance for your target market before mass production.
Yes. The activated carbon-to-resin ratio can be adjusted to prioritise lead removal, scale reduction, or a balance of both. Housing shape, colour, logo, and packaging are also customisable. Share your water hardness and contaminant targets, and we will propose a media combination for evaluation.
Send your device model, a drawing or old part, expected flow rate, operating conditions, and planned quantity through our contact page. We will review fitment and media options, then provide a quotation and sample timeline. Sample and MOQ terms are confirmed in the quote for your specific configuration.
MOQ and lead time depend on whether you choose a standard housing or a custom mould. They are confirmed in the quotation after we review your drawing, media specification, and packaging requirements. For planning, please include your expected annual volume so we can propose a production schedule.
Replacement interval depends on the cartridge capacity, your water hardness, and daily usage. The resin and carbon become exhausted over time, and scale reduction and lead removal decline gradually. We recommend setting the replacement interval based on your tested capacity and local water conditions, and we can help define a suitable interval for your market.
Thesvin holds ISO 9001, ISO 14001, and IATF 16949 certifications, and products can be supplied with REACH and RoHS compliance documentation. Water-contact safety is supported by production in clean workshops. Tell us your destination market and the documents you need, and we will confirm what can be provided with your order.