Aquaphor-Compatible OEM Cartridges: Complete Sourcing Guide from China

Aquaphor is the dominant water filter brand across Russia and the CIS, holding more than 40% market share in the residential filtration segment. That installed base — tens of millions of pitcher filters, under-sink systems, and countertop units — creates a replacement cartridge demand that renews every 6 to 12 months. For distributors, the question is not whether the market exists. The question is whether to pay full Aquaphor wholesale margins or source compatible cartridges directly from the Chinese factory that makes the same media grades.

This guide covers the Aquaphor system-to-cartridge compatibility matrix, a cartridge-by-cartridge specification breakdown, quality comparison between original and OEM, the step-by-step production process at XZH, pricing tiers, EAC certification support for the Russian market, and answers to the most common distributor questions.

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1. Why Aquaphor-Compatible Cartridges?

The Russian and CIS water filter market is large, loyal to Aquaphor branding, and chronically undersupplied at the replacement cartridge level. End users buy the system once and then buy cartridges repeatedly for years. Aquaphor knows this: original replacement cartridges are priced to capture that aftermarket revenue.

Distributors who source OEM-compatible cartridges from China capture 30 to 50% cost advantage per unit while supplying the exact same filtration chemistry — activated carbon, ion-exchange resin, silver-impregnated post-carbon — that the original cartridges contain. The mechanical interface (snap-on collar, O-ring dimensions, flow path geometry) is engineered to match. End users experience zero performance difference. Distributors keep the margin.

Key market dynamics driving this opportunity:

• Volume is predictable. A distributor with 10,000 active Aquaphor Crystal households generates 20,000–30,000 cartridge replacements per year on a fixed cycle.
• SKU consolidation is possible. Several Aquaphor systems share cartridge slots. Stocking five K-series SKUs covers the majority of installed systems.
• Private label is viable. With a 3,000-piece MOQ, XZH produces cartridges under your brand name with retail-ready packaging — giving you a proprietary product line that does not compete on Aquaphor’s terms.

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2. Aquaphor System Compatibility Chart

The table below maps the most widely installed Aquaphor systems to their original cartridge models and the corresponding XZH OEM-compatible equivalents. Media options column shows what fill variations XZH can produce for each slot.

Aquaphor System	Cartridge Slots	Original Models	XZH Compatible	Media Options
Crystal (3-stage countertop)	3	K2 + K5 + K7	XZH-K2 + XZH-K5 + XZH-K7	PP, GAC block, silver carbon
Crystal H (2-stage)	2	KH + K7M	XZH-KH + XZH-K7M	Ion exchange + mineralizing
Morion (RO, 11”)	4	K5 + K2 + K7M + RO membrane	XZH-K5 + XZH-K2 + XZH-K7M + RO-50G	GAC, PP, mineralizing, TFC membrane
Trio (3-stage)	3	K2 + K5 + K7	XZH-K2 + XZH-K5 + XZH-K7	PP, GAC block, silver carbon
Favorit (under-sink)	3	K5 + K2 + K7	XZH-K5 + XZH-K2 + XZH-K7	GAC block, PP, silver carbon

All XZH Aquaphor-compatible cartridges use the snap-on collar interface. For detailed product listings, see the Aquaphor-compatible cartridge product page and the snap-on cartridge category.

If your customers run a system not listed here, send us the model number — XZH maintains dimensional tooling for additional Aquaphor variants and can confirm compatibility within 48 hours.

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3. Cartridge-by-Cartridge Breakdown

K2 — Mechanical Pre-Filter

The K2 is the first-stage mechanical filter in Crystal, Trio, and Favorit systems. Its function is sediment removal: rust particles, sand, suspended solids down to 5 microns.

• Media: Polypropylene melt-blown fiber, 5-micron nominal rating
• Dimensions: Snap-on collar, compatible with Aquaphor locking bracket
• Service life: 3,000 liters (approximately 6 months at typical household consumption)
• XZH equivalent: XZH-K2; iodine value not applicable (mechanical stage, no carbon)
• OEM note: PP fiber density and micron rating are adjustable at the manufacturing stage. XZH can produce 1-micron, 5-micron, or 10-micron versions on request.

K3 — Ion-Exchange Softening Cartridge

The K3 targets calcium and magnesium hardness, converting scale-forming minerals to sodium via cation exchange resin. Used primarily in hard-water regions of Russia (Ural, Siberia, parts of Central Asia).

• Media: Food-grade cation exchange resin (Na-form), crosslinked polystyrene divinylbenzene
• Exchange capacity: 130–160 g CaCO3 equivalent per cartridge
• Service life: 2,000–3,500 liters depending on source water hardness
• XZH equivalent: XZH-K3; resin sourced from ISO-certified suppliers, NSF-listed resin grades available on request
• OEM note: Resin grade (standard vs. fine mesh vs. softplus) can be specified. Fine mesh resin offers 15–20% higher exchange capacity at the same volume.

K5 — Mechanical and Sorption Combined

The K5 is a dual-function cartridge: mechanical pre-filtration plus activated carbon sorption. It handles chlorine, chloramines, organic compounds, and taste/odor while providing a secondary sediment barrier.

• Media: Melt-blown PP outer layer + granular activated carbon (GAC) inner core
• Carbon iodine value: ≥1050 mg/g (coconut shell base)
• Dimensions: Snap-on collar, matches Aquaphor K5 interface
• Service life: 3,500 liters
• XZH equivalent: XZH-K5; carbon sourced from coconut shell, NSF 42 raw material grade
• OEM note: The carbon core can be upgraded to carbon block construction for higher chlorine reduction efficiency, particularly relevant for Moscow and St. Petersburg tap water profiles.

K7 — Final Sorption Stage (Silver-Impregnated)

The K7 is the final cartridge in Crystal, Trio, and Favorit systems. Its silver impregnation provides bacteriostatic protection — preventing microbial growth within the cartridge itself during periods of low water use.

• Media: Silver-impregnated granular activated carbon (Ag-GAC)
• Carbon iodine value: ≥1100 mg/g (premium coconut shell)
• Silver content: 0.05–0.08% by weight, food-safe application
• Service life: 3,500 liters
• XZH equivalent: XZH-K7; same silver impregnation process, tested to GOST R 51209 equivalent leaching limits
• OEM note: Silver-impregnated carbon is the specification most scrutinized by Russian trade buyers. XZH provides batch test certificates showing silver content and leach test results with every production lot.

K7M — Mineralizing Post-Filter

The K7M replaces the final carbon stage in systems where remineralization of RO or deep-filtered water is the priority. It adds calcium and magnesium back to softened or RO-treated water to improve taste and hardness balance.

• Media: Food-grade mineralizing granules (dolomite + coral calcium blend)
• Output hardness increase: Typically +30 to +80 mg/L CaCO3 depending on contact time and source water
• Service life: 4,000–5,000 liters (mineralizing media depletes more slowly than carbon)
• XZH equivalent: XZH-K7M; granule blend ratio adjustable to target a specific output hardness range

KH — Softening Module (Crystal H)

The KH is the primary cartridge in the Crystal H 2-stage system, a compact under-sink unit designed for very hard water markets. It combines a softening resin stage with a mechanical pre-filter in a single snap-on housing.

• Media: Cation exchange resin + PP pre-filter wrap
• Exchange capacity: 180–200 g CaCO3 equivalent (larger bed volume than K3)
• Service life: 2,000 liters in 20+ gpg hardness water; 3,500 liters in moderate hardness
• XZH equivalent: XZH-KH; resin and PP layers assembled separately and verified for correct flow path geometry before packing

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4. Quality Comparison: Original vs. OEM

The honest answer to “are OEM cartridges as good as originals?” is: it depends entirely on what the OEM factory puts inside. At XZH, the raw material specifications are benchmarked against Aquaphor’s published filter media standards and verified by third-party testing.

Parameter	Aquaphor Original	XZH OEM Compatible
Carbon iodine value (K5, K7)	≥1050 mg/g (published)	≥1100 mg/g (XZH standard, tested per lot)
Carbon source	Coconut shell	Coconut shell, same supply chain tier
Ion exchange resin grade	Food-grade, NSF-listed	Food-grade, NSF 44 raw material grade
Silver impregnation (K7)	0.05–0.08% Ag by weight	0.05–0.08% Ag by weight, leach-tested
Flow rate at 3 bar	~1.5 L/min	1.4–1.6 L/min (within tolerance)
Pressure drop	Manufacturer’s spec	Within ±10% of Aquaphor published values
Mechanical fit (snap collar)	Reference standard	Tooling matched to Aquaphor collar dimensions
Cartridge service life	3,000–3,500 L per stage	3,000–3,500 L per stage
Third-party test certificates	Available via distributor	Provided with every production lot
EAC / TR CU documentation	Aquaphor holds declarations	XZH supports importer’s own EAC declaration

The key difference in favor of XZH OEM is lot-level documentation. Because XZH is an OEM factory supplying multiple markets, every production run is accompanied by raw material COAs, finished product test reports, and a batch number traceable to the production date. Aquaphor distributors reselling originals typically do not have access to this level of documentation for their own customers.

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5. How to Start OEM Production

The production timeline from first contact to goods on the truck is 6 to 8 weeks for a first order. Repeat orders run faster because tooling and material sourcing are already resolved.

Step 1 — Send target system model and quantity Tell us which Aquaphor systems your customers run and your projected annual volume. This determines which K-series SKUs to sample and whether your volume justifies custom tooling adjustments.

Step 2 — Receive samples (approximately 2 weeks) XZH ships production-representative samples via DHL or FedEx. For Aquaphor-compatible cartridges, we include a sample of each K-series type in your order list plus a compatibility verification report showing dimensional measurements vs. the Aquaphor reference.

Step 3 — Testing and approval Test samples in your own systems or at an accredited lab. XZH can provide third-party test data from our existing test archive to accelerate this step. For EAC purposes, samples tested at an accredited Russian lab are the standard path.

Step 4 — Customize branding At 3,000 pieces or above, XZH applies your brand name, logo, and product code to the cartridge housing via pad printing or label. Retail box printing (CMYK, full color, Russian language text) is available from 3,000 boxes per SKU. We coordinate native Russian packaging text review if you provide the content.

Step 5 — Bulk production (25 to 35 days) Production lead time from deposit to finished goods is 25 days for standard SKUs, up to 35 days if custom packaging is involved. XZH provides a production milestone report at the midpoint (media filling complete) and at final QC (assembled and pressure-tested).

Step 6 — Shipment FOB Ningbo XZH handles export packing, labeling per Customs requirements, and hands off to your nominated freight forwarder at Ningbo port. Typical shipment modes are FCL 20’ for orders above 15,000 pieces or LCL for smaller initial orders. Sea freight transit to Russian Black Sea or Baltic ports runs 25 to 40 days depending on routing. See our OEM manufacturing page for full production documentation.

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6. Pricing and MOQ Guide

Pricing varies by cartridge type (media cost is the primary driver — silver-impregnated K7 costs more than a plain PP K2) and by volume tier. The table below shows indicative ex-factory price ranges. Request a formal quote via the contact page with your target SKU mix and annual volume for an exact figure.

Cartridge Type	MOQ 1,000 pcs	MOQ 3,000 pcs	MOQ 5,000+ pcs	Packaging Included
K2 (PP mechanical)	USD 0.85–1.10	USD 0.65–0.85	USD 0.50–0.65	Plain white box
K3 (ion exchange)	USD 1.40–1.80	USD 1.10–1.40	USD 0.90–1.10	Plain white box
K5 (PP + GAC)	USD 1.20–1.55	USD 0.95–1.20	USD 0.80–0.95	Plain white box
K7 (silver carbon)	USD 1.60–2.00	USD 1.25–1.60	USD 1.00–1.25	Plain white box
K7M (mineralizing)	USD 1.50–1.90	USD 1.20–1.50	USD 0.95–1.20	Plain white box
KH (softening module)	USD 1.70–2.10	USD 1.35–1.70	USD 1.10–1.35	Plain white box

What each tier includes:

• 1,000 pcs (minimum): Production-quality cartridges, plain white box with generic specifications printed. No logo. Suitable for distributors testing the product with select customers before committing to private label.
• 3,000 pcs: Full private-label option. Your logo and brand name on cartridge housing and retail box. Russian-language packaging text supported. Custom color box available at this tier.
• 5,000+ pcs: Lowest unit cost. Priority production scheduling. Dedicated QC lot documentation. Option to add holographic security labels or QR-code authentication stickers for anti-counterfeiting.

Mixed-SKU orders (e.g., 1,000 pcs K2 + 1,000 pcs K5 + 1,000 pcs K7) count toward the 3,000-piece tier for packaging upgrades. The pricing tiers above apply per SKU individually.

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7. EAC Certification for the Russian Market

Any water contact product sold in Russia, Kazakhstan, Belarus, and the broader Eurasian Economic Union must comply with the technical regulation TR CU 010/2011 (“On safety of machinery and equipment”) and, for water treatment specifically, TR CU 021/2011 for food safety contact materials. In practice, Russian customs requires an EAC Declaration of Conformity before water filter cartridges can be cleared for retail or wholesale distribution.

What EAC declaration covers:

• Confirmation that materials in contact with drinking water (carbon, resin, PP housing, O-rings) meet migration limits and do not introduce harmful substances into filtered water
• Compliance with the cartridge’s declared filtration claims
• Applicability per TR CU 021/2011 and GOST R 51232

How XZH supports your EAC process:

1. Material documentation package: XZH provides NSF-listed raw material certificates, food-grade compliance letters from media suppliers, and technical data sheets for all components — the complete “material evidence” package an EAC test lab requires to open a declaration file.

2. Sample production for lab testing: Russian EAC labs (such as Rospotrebnadzor-accredited centers or certified third-party labs like SGS Russia, Bureau Veritas Russia) require physical samples for testing. XZH produces a dedicated pre-production sample batch for lab submission on request.

3. Technical file preparation: XZH’s export team can prepare the technical file in the format required by Russian EAC certification bodies, including product descriptions in Russian, material specifications, and manufacturing process descriptions.

4. Certificate scope: The EAC declaration is issued to your company as the importer/brand owner. XZH’s documentation supports the declaration but does not itself carry the EAC mark — this is correct for private-label sourcing and gives you full control over your declaration scope and renewal timeline.

Typical EAC declaration timeline via an accredited Russian lab is 4 to 8 weeks from sample submission. XZH recommends initiating the EAC process in parallel with your first production order so that both are ready for market entry simultaneously.

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8. Frequently Asked Questions

Are your Aquaphor-compatible cartridges exactly the same as originals?

The filtration media grades are equivalent or superior — XZH uses the same coconut-shell activated carbon, same food-grade ion exchange resin, and the same silver-impregnated carbon grades that Aquaphor specifies. The housing geometry and snap-collar interface are dimensionally matched. The difference is brand name and sourcing margin. If your end user opens both cartridges and compares the media visually and by smell, they will not find a meaningful difference. If they run a comparative chlorine reduction test at the same contact time, results will fall within the same performance band.

Can I get EAC certification for my private label?

Yes. EAC declarations in Russia are issued to the importer or brand owner, not to the manufacturer. XZH supports the documentation side of the process: material certificates, technical files, sample production for lab submission. You engage an accredited Russian certification body and the declaration is issued in your company name. This is the standard path for any Chinese OEM-sourced product entering the Russian market. See Section 7 above for the full process.

What if my customer’s system is a specific Aquaphor model I don’t see listed?

Send us the model name or system photo. Aquaphor has released multiple generations of Crystal, Morion, and Trio variants over the years, and some regional distributor editions exist with slightly different cartridge dimensions. XZH maintains a dimensional database of Aquaphor collar variants and can confirm compatibility within 48 hours. If a new tooling adjustment is required, we will quote the tooling cost and lead time — for most variants, no new tooling is needed because the collar family is consistent across generations.

How long do OEM Aquaphor cartridges last?

Service life is equivalent to the Aquaphor original specification: K2/K5/K7 at 3,000–3,500 liters per cartridge, K7M at 4,000–5,000 liters, K3/KH at 2,000–3,500 liters depending on source water hardness. These figures assume average household consumption of 8–10 liters per day for drinking and cooking, translating to a 6–12 month replacement interval. XZH can print the service life recommendation in Russian on the retail box at your specification.

Can I mix different K-series models in one order?

Yes. Mixed orders are common. A typical opening order covers K2 + K5 + K7 to service the Crystal system installed base, with K7M added if RO customers are also in the mix. The minimum for private-label packaging is 3,000 pieces per SKU, but plain-box orders can be 1,000 pieces per SKU with no minimum on the number of SKUs in the order. Freight consolidation across SKUs is handled by XZH — everything ships as one consignment.

Do you ship to Russia directly?

XZH ships FOB Ningbo. The forwarding arrangement from Ningbo to Russia is coordinated by your freight forwarder or XZH can connect you with freight partners experienced in the China-Russia corridor (sea via Vladivostok or St. Petersburg, or overland via Central Asia). Since 2022 the logistics landscape for China-Russia trade has shifted, and XZH works with forwarders who have current knowledge of sanctioned-goods compliance, customs documentation requirements, and routing options. We do not ship to sanctioned entities or under-declared customs values — all documentation reflects actual transaction values.

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Start Sourcing Aquaphor-Compatible Cartridges

The replacement cartridge market for Aquaphor systems is one of the most predictable revenue streams in the Russian water filtration trade. Demand is installed-base-driven, replacement cycles are fixed, and the product specifications are well-documented.

XZH produces Aquaphor-compatible K-series cartridges to the same media standards as the originals, supports EAC certification, and can put your brand name on the box from 3,000 pieces. The water filter cartridge size compatibility chart covers dimensional context if you are also evaluating standard or quick-connect formats alongside Aquaphor-compatible SKUs.

Request Aquaphor-compatible samples — free for qualified distributors. Contact our export team