| Fact | Detail |
|---|---|
| ACF chlorine removal | 99.5% free-chlorine removal at start of flow in SGS third-party testing (GB/T 5750.11-2023) |
| ACF over service life | Separate third-party tests showed over 96.8% initial removal and 90.6% after 5 tons of continuous flow |
| Calcium sulfite balls | Work in hot and cold water; high hardness; drinking-water-grade hygiene safety verified across 16 items; RoHS checked |
| Mineral / metasilicate media | Conditions water toward mildly alkaline (test reference pH 8.1); REACH (SVHC) checked; lifestyle positioning only |
| PP cotton | Pre-filter layer that captures sediment and particles |
| Consumable logic | Filters are consumables; performance varies with water quality and usage |
| Sourcing | Used in ZHONGHE filter shower heads and replacement cartridges; MOQ from 2,000 units for many projects |
Why Filter Media Is a Buying Decision, Not a Detail
Two filter shower heads can look identical in a photo and behave completely differently in use, because the difference sits inside the cartridge. The media mix determines what the product can honestly claim, which test reports back those claims, and how often the end user buys a replacement cartridge.
ZHONGHE builds its filter shower heads and replacement cartridges around four media: activated carbon fiber (ACF), calcium sulfite ceramic balls, PP cotton, and mineral bead blends. Each does a different job, and most commercial cartridges combine two or more; see /products/filter-shower-heads/ and /products/replacement-filters-accessories/.
Activated Carbon Fiber (ACF): Tested Chlorine Reduction
ACF is the workhorse for reducing free chlorine, the disinfectant residue in many municipal water supplies. Its fibrous structure presents a very large surface area to passing water, allowing meaningful contact in the short time water spends inside a cartridge.
The ACF used in ZHONGHE filter shower heads has third-party data behind it. In SGS testing to GB/T 5750.11-2023, it showed 99.5% free-chlorine removal at the start of flow; separate third-party tests showed above 96.8% initially and 90.6% after 5 tons of continuous flow. Two hedges belong beside those numbers in any listing: filters are consumables, and real-world performance varies with water quality, temperature, and flow.
Calcium Sulfite Ceramic Balls: Hot and Cold Water
Calcium sulfite ceramic balls are the second pillar of most shower cartridges, and their headline property is that they work in both hot and cold water, which suits a product that runs warm by definition. In cartridge design they complement ACF rather than replace it.
The calcium sulfite balls ZHONGHE uses are high-hardness, which helps them resist crumbling inside the chamber. They carry verified drinking-water-grade hygiene safety across 16 test items and a RoHS check, documentation that often decides whether a listing survives a platform audit.
PP Cotton and Mineral Beads: The Supporting Layers
PP cotton is the simplest medium in the stack: a fibrous polypropylene layer that captures sediment such as sand and pipe particles before water reaches the finer media. Placed first, it extends the working life of everything behind it.
Mineral and metasilicate media handle water conditioning. ZHONGHE's mineral media conditions water toward mildly alkaline, with a test reference value of pH 8.1, and is checked for REACH substances of very high concern (SVHC). It is positioned strictly as a lifestyle water-conditioning feature, with no cosmetic or medical claims, and buyer listings should follow the same discipline. Seen through a transparent PC handle, mineral bead blends also show the shopper that the product filters water.
Filter Media Comparison
The table below summarizes the four media. Performance figures come from third-party testing under stated conditions; field results vary with water quality and usage.
| Medium | Primary function | Verified data and checks | Typical position in cartridge |
|---|---|---|---|
| Activated carbon fiber (ACF) | Free-chlorine reduction | 99.5% at start of flow (SGS, GB/T 5750.11-2023); >96.8% initial, 90.6% after 5 tons | Core treatment layer |
| Calcium sulfite ceramic balls | Treatment effective in hot and cold water | Hygiene safety verified (16 items); RoHS checked; high hardness | Core treatment layer alongside ACF |
| PP cotton | Sediment and particle capture | Qualitative function; no percentage claimed | First layer, protecting media behind it |
| Mineral / metasilicate beads | Conditions water toward mildly alkaline | Test reference pH 8.1; REACH (SVHC) checked; lifestyle positioning | Visible blend, often in a clear PC chamber |
Choosing Media by Market and Price Band
Entry price bands usually carry a one- or two-medium cartridge, for example PP cotton plus calcium sulfite, keeping cost down while supporting a genuine filtration story. Mid-band products commonly add ACF and lead with its third-party chlorine data. Upper bands tend to combine all four media in a visible multi-layer cartridge behind a clear PC chamber, where the layered look itself justifies the price step.
Market rules shape the mix as much as price does. Where municipal water is heavily chlorinated, ACF data carries the listing. Where platforms scrutinize claims, documented media such as RoHS-checked calcium sulfite and REACH-checked mineral beads keep the compliance file clean. ZHONGHE adapts the media mix to buyer specification through /oem-odm/.
Building a Replacement-Cartridge Program
Filters are consumables, and that is a commercial feature, not a flaw. A replaceable cartridge creates a repeat purchase, and the cartridge program deserves as much planning as the launch product.
- Lock the cartridge interface early so future cartridge orders fit every head already sold.
- Set replacement guidance as usage-based: cartridge life varies with water quality and usage, so avoid fixed promises.
- Order heads and spare cartridges together; ZHONGHE's MOQ starts from 2,000 units for many projects.
- Use the transparent PC chamber as the reminder: visibly depleted media prompts reordering.
- List refills as a separate SKU from day one so replacement revenue is trackable.