Our sintered activated carbon sticks are formed from high-quality coconut shell activated carbon powder through a high-temperature sintering process, with a standard filtration accuracy of 5 microns (customization available from 1 to 10 microns). Main performances include: effective removal of residual chlorine (removal rate >95%), odors, discoloration, VOCs, and organic pollutants; it also provides physical filtration functions to intercept impurities such as sand and rust. The rated flow is approximately 1.0 L/min, with a suggested service life of 6-12 months or a water treatment volume of approximately 6000L (specifics depend on inlet water quality). For more detailed technical parameter sheets (TDS), please contact us.

Yes, Cleantop's activated carbon filter series has been certified by the American NSF and EPA, and the raw materials meet FDA food-grade contact standards to ensure safety and compliance for drinking water filtration. The company has also obtained ISO 9001, ISO 14001, and ISO 45001 system certifications, and in 2024, added IATF16949 and medical device GMP certifications. We have a national-level CNAS accredited testing center, providing customers with authoritative third-party testing reports, fully meeting access requirements of major markets in Europe, America, Japan, and South Korea.

We fully support it. Cleantop has over 20 years of OEM/ODM experience, having provided a thousand custom solutions to international clients. Customization options include: dimensions (outer diameter, inner diameter, length), filtration accuracy (1-10μm), cap structures (flat, fin, bayonet, with sealing ring, etc.), activated carbon materials (coconut shell, coal-based, blended carbon, or added KDF/lead-removing/fluoride-removing media), flow ratings, packaging designs (neutral packaging, client brand packaging, color boxes, shrink wrap), laser marking, and exclusive colors, completely developed and produced according to customer needs.

Cleantop owns a 50,000㎡ factory, of which 20,000㎡ are six clean workshops, ensuring that filters avoid secondary contamination during production and assembly. Our quality control process includes: IQC (incoming material inspection) → IPQC (in-process inspection) → FQC (full inspection of finished products) → OQC (outgoing inspection). The company is equipped with a national-level CNAS recognized testing center, capable of performing flow tests, pressure differential tests, residual chlorine removal rate tests, TOC tests, microbiological tests, burst pressure tests, and more, with each batch of products accompanied by a COA quality report to ensure batch consistency.

The MOQ for standard models of sintered activated carbon sticks is typically 1000-2000 pieces, depending on product specifications and packaging requirements; the recommended MOQ for custom models is 5000 pieces. In terms of delivery time, standard products in stock can be shipped within 7-15 days; the usual mass production lead time for OEM custom orders is generally 25-35 days. We have our own factory in Zhongshan, Guangdong, with flexible production schedules, and can arrange VMI inventory or batch deliveries for long-term partners to ensure your supply chain stability.

Yes, we strongly encourage customers to conduct sample testing before placing bulk orders. Standard specification samples are usually available for free, up to 2-5 pieces, with the customer only needing to cover international shipping; custom specification samples may incur a nominal sampling fee depending on development difficulty, which can be refunded after bulk ordering. Sample delivery times: standard samples 3-5 days, custom samples 10-20 days. We can also collaborate with customers for joint testing in their labs or third-party organizations (such as SGS, NSF) to assist customers in completing project certifications.

Cleantop products are steadily sold in more than 40 countries and regions, including Europe, the United States, Japan, and South Korea, serving well-known water purification brands, home appliance OEM manufacturers, and trade distributors worldwide. With over 20 years of industry experience, we have a deep understanding of the strict regulatory requirements for drinking water products in the European and American markets (such as NSF/ANSI 42, 58, 61) and can assist customers in product testing, certification applications, and label compliance, making us a strategic supplier trusted by many international brands.

Cleantop provides comprehensive quality guarantees for products leaving the factory. If customers discover batch quality issues during delivery or use, please provide samples and problem descriptions within 7 working days, and we will complete a failure analysis within 3-5 working days at our CNAS laboratory and issue a report. If confirmed to be our responsibility, we will replenish, return, or provide discounts according to the contract. Additionally, we provide annual product performance re-inspections, technical support, and application consulting services, ensuring partners have no worries.