5 Leading OEM Water Purifier Manufacturers in China for Private Label Brands

China has thousands of companies selling water filters, reverse osmosis systems and drinking-water appliances. However, only a portion of them are suitable for private-label, OEM or ODM cooperation.

A well-known consumer brand is not necessarily an accessible manufacturing partner. Companies such as Xiaomi, Midea and A.O. Smith may have strong consumer recognition, but that does not automatically make them suitable choices for an importer or brand seeking flexible private labeling, engineering customization, certification coordination and long-term replacement-filter supply.

For B2B buyers, a more useful question is:

Which Chinese water purifier manufacturer is best suited to the product, market, volume and level of customization required by my project?

This guide compares five manufacturers representing different sourcing profiles:

• HisoAir: Premium countertop and undersink ODM development
• Kemflo Group: Large-scale vertically integrated water filtration manufacturing
• Ningbo Hidrotek: Traditional RO systems, membranes and water-treatment components
• Canature: Whole-house filtration, water softening and professional treatment components
• Lonsid: Water purification combined with heating, cooling and dispensing

The manufacturers are not presented as an absolute ranking by revenue, production volume or market share. They were selected because each represents a distinct type of OEM or ODM partner that may be relevant to international private-label brands.

Quick Comparison of the Five OEM Water Purifier Manufacturers

Important: Certification support should always be verified by exact model. A certified component, membrane or pressure tank does not automatically mean that the complete finished purifier is certified.

How Were These Manufacturers Selected?

The list was developed for international buyers looking for an actual manufacturing or product-development partner rather than a consumer-facing brand.

Each manufacturer was evaluated against six practical criteria:

1. Confirmed water purification product portfolio

The company must publicly present water purification systems, water-treatment equipment or relevant components as a core business.

2. Publicly documented OEM or ODM capability

The manufacturer must offer private-label production, product customization, engineering development or another form of B2B manufacturing support.

3. Relevance to international buyers

The company should demonstrate export activity, international-market support, multilingual materials or experience serving brands outside mainland China.

4. Manufacturing and engineering scope

The evaluation considers whether the company primarily assembles catalog products or also supports filtration design, molds, components, electronics, testing and product development.

5. Certification and quality support

The manufacturer should be able to provide relevant quality-system information, component documentation, laboratory testing or certification support. The scope varies by company and product.

6. Clear suitability for a specific buyer type

Rather than declaring one universal winner, this guide identifies the projects for which each manufacturer appears most relevant.

1. HisoAir: Best for Premium and Agile ODM Water Purifier Development

場所 Dongguan, Guangdong, China

Primary positioning: Premium countertop and undersink water purifier OEM/ODM development

Best suited for: Brands that need differentiated design, smart features, flexible product development and support beyond basic logo replacement

HisoAir is positioned as an agile product-development partner for premium indoor environmental products. Its water purification portfolio focuses on countertop and undersink systems, including high-flow reverse osmosis platforms, temperature-controlled countertop appliances, smart faucets and connected-product options.

Compared with large traditional water-treatment manufacturers, HisoAir’s main advantage is not manufacturing scale. Its differentiating strengths are flexibility, consumer-product development, smart-hardware integration and the ability to combine air and water products within a broader indoor environmental platform.

Main product focus

• Tankless undersink reverse osmosis systems
• Countertop RO water purifiers
• Heating and dispensing water appliances
• Smart faucets and filter-life monitoring
• PFAS-oriented filtration configurations
• Private-label replacement-filter platforms
• Connected water products and IoT integration

OEM and ODM capabilities

Depending on the project, HisoAir can support:

• Logo, packaging and user-manual customization
• Filter and membrane configuration
• Exterior design and CMF development
• Faucet, display and user-interface customization
• TDS monitoring and filter-life functions
• Wi-Fi, app and IoT platform integration
• Prototype coordination and engineering validation
• Certification planning and third-party testing coordination
• China+1 sourcing and production planning

HisoAir publicly presents water purification platforms and production support involving China, Vietnam, Thailand and Malaysia. Buyers should confirm the available manufacturing location for the specific product, order volume, tooling and certification scope.

Certification and PFAS support

HisoAir is better described as supporting certification planning rather than claiming that every product is already fully certified.

For a project involving PFAS or other contaminant-reduction claims, the development process should define:

• The exact contaminant and marketing claim
• The complete filter configuration
• The required flow rate and filter capacity
• The intended test standard
• The exact system and replacement element to be evaluated
• The certification owner and official listing strategy

Any final reduction claim should be supported by a report or certification listing for the exact product and filter configuration.

Typical buyer profile

HisoAir may be a suitable partner for:

• Premium appliance brands
• Air quality brands expanding into water
• Smart-home and IoT companies
• Environmental hardware businesses
• North American and European private-label brands
• Companies requiring more flexibility than a large-volume catalog factory provides

Potential limitations

HisoAir may not be the best option for buyers whose only priority is the lowest possible price for an unchanged generic RO system. Large orders requiring deeply integrated membrane, cartridge, tank and component production may also favor a larger traditional water-treatment group.

Why HisoAir is included: It represents a more agile ODM model for brands seeking premium product differentiation, smart integration and cross-category Air + Water development.

Explore HisoAir’s water purifier platforms

2. Kemflo Group: Best for Large-Scale Integrated OEM/ODM Manufacturing

Primary China operation: Nanjing, Jiangsu, with a broader international manufacturing and business footprint

Primary positioning: Large-scale, vertically integrated water filtration OEM/ODM manufacturer

Best suited for: Established brands and high-volume programs requiring broad manufacturing, component and engineering capability

Kemflo Group is one of the most comprehensive manufacturers in this comparison. Its public water filtration materials describe an integrated process covering product design, R&D, testing, production and logistics.

According to Kemflo’s official water business website, the group works with more than 100 global partner brands, serves over 60 countries and regions and operates multiple manufacturing bases. These figures are company-reported and should be independently confirmed during supplier qualification.

Main product focus

• Undersink RO systems
• Countertop water dispensers
• Hot, cold and sparkling water appliances
• Residential filtration systems
• Commercial water filtration
• Filter cartridges and carbon blocks
• RO membranes and water-treatment components
• Smart faucets and instant-heating systems

OEM and ODM capabilities

Kemflo publicly promotes customized OEM and ODM services and complete turnkey development. Its capabilities include:

• Product and industrial design
• Mold development
• Plastic injection
• Filter and cartridge development
• Water-system engineering
• Laboratory testing
• Smart manufacturing
• Mass production and logistics

This broad internal capability can reduce dependency on external component suppliers and may be valuable for large customers requiring a coordinated product platform.

Typical buyer profile

Kemflo may be especially relevant to:

• Large appliance brands
• National retailers
• Established water filtration companies
• High-volume distributors
• Customers requiring multiple water product categories
• Programs requiring substantial tooling and production capacity

Potential limitations

Large integrated manufacturers may have more formal qualification requirements, higher commercial thresholds or less flexibility for very small and highly experimental projects. Buyers should confirm MOQ, engineering fees, project priority and ownership of custom tooling before committing.

Why Kemflo is included: It represents the large-scale, vertically integrated OEM/ODM manufacturing model.

View Kemflo’s official water filtration website

3. Ningbo Hidrotek: Best for Traditional RO Systems and Components

場所 Ningbo, Zhejiang, China

Primary positioning: Broad supplier of RO systems, membranes, filters and water-treatment components

Best suited for: Importers and traditional water-treatment brands seeking a wide catalog of systems and replacement components

Ningbo Hidrotek was established in 2003 and specializes in water filtration and purification products. Its portfolio covers residential, commercial and industrial treatment systems as well as a wide range of replacement parts.

The company’s official website states that it provides OEM and ODM services and maintains production lines, laboratory equipment, molds and in-house R&D resources.

Main product focus

• Tankless high-flow RO systems
• Traditional tank-based RO systems
• Residential and commercial RO units
• RO and nanofiltration membranes
• Filter cartridges and housings
• 軟水器
• Whole-house filters
• Faucets, tanks and quick-connect fittings
• Industrial water-treatment equipment

OEM and ODM capabilities

Hidrotek appears well suited to buyers who want to source both complete systems and related components from one supplier.

Its public product range supports:

• Private-label catalog products
• Filter and membrane selection
• System configuration changes
• Component sourcing
• RO system customization
• Packaging and branding
• Residential, commercial and industrial product combinations

Certification considerations

Hidrotek states that selected RO membranes carry NSF certification and that it holds or supports other certifications and quality documentation, including CE, RoHS and ISO 14001.

Buyers should verify:

• Whether the certification applies to a membrane, component or complete system
• The exact manufacturer and model shown in the listing
• The approved production location
• The standard and reduction claim covered
• Whether the buyer’s private-label model can be added to the listing

An NSF-certified membrane does not automatically make the complete RO purifier NSF certified.

Typical buyer profile

Hidrotek may be suitable for:

• Water-treatment wholesalers
• Importers seeking broad catalogs
• Traditional RO brands
• Replacement-filter distributors
• Commercial water-treatment suppliers
• Buyers that need systems and spare parts from one source

Potential limitations

Buyers seeking highly differentiated consumer electronics, advanced mobile-app integration or premium industrial design should confirm whether the required expertise will be managed internally or through external development partners.

Why Hidrotek is included: It represents a broad traditional RO and water-treatment sourcing platform with both systems and components.

View Hidrotek’s official company profile

4. Canature: Best for Whole-House Filtration and Water Softening

場所 中国、上海

Primary positioning: One-stop manufacturer of water-treatment systems and components

Best suited for: Whole-house water brands, professional dealers and companies sourcing softeners, valves, tanks and point-of-entry systems

Canature was founded in 2001 and is publicly listed in China under stock code 300272. Its official website describes the company as a one-stop manufacturer of water-treatment systems and components.

Canature differs from manufacturers focused mainly on countertop or undersink drinking-water appliances. Its strongest positioning is in whole-house water treatment, softening and vertically integrated core components.

Main product focus

• Residential water softeners
• Commercial water softening systems
• Whole-house water filters
• プレフィルター
• Reverse osmosis systems
• RO membranes
• Control valves
• Pressure tanks
• Brine tanks
• Commercial drinking-water systems

Canature’s official site states that it designs and manufactures more than 20 series and over 80 models of water-softener cabinets.

OEM and ODM capabilities

Canature’s public product materials state that it accepts OEM and ODM projects. Its broad component capability may be valuable to buyers that require:

• Customized water softeners
• Whole-house filtration platforms
• Control-valve integration
• Pressure tank and brine tank sourcing
• RO systems and membranes
• Residential and commercial treatment systems
• Private-label colors, interfaces and functions

Certification considerations

Canature publishes certification information for selected products and components, including certain softeners, control valves, pressure tanks, RO systems and membranes.

Certification scope must be checked carefully. Buyers should confirm:

• The exact model shown in the official listing
• Whether certification applies to a component or complete system
• The manufacturing site covered
• The approved materials and configurations
• Whether private-label branding is permitted
• Whether customization requires review or retesting

Typical buyer profile

Canature may be a strong match for:

• Whole-house water brands
• Water softener dealers
• Plumbing and building-material distributors
• Commercial treatment companies
• Professional water-treatment integrators
• Brands sourcing systems and core components together

Potential limitations

A buyer developing a compact premium countertop appliance or a highly connected consumer product should determine whether Canature’s whole-house and professional treatment strengths match the project’s industrial-design and user-experience requirements.

Why Canature is included: It represents an integrated professional water-treatment manufacturer with particular strength in whole-house filtration, softening and core components.

View Canature’s official website

5. Lonsid: Best for Water Purification and Dispensing Appliances

場所 Wenzhou, Zhejiang, China

Primary positioning: Water purification and drinking-water appliance manufacturer

Best suited for: Brands seeking products that combine filtration with heating, cooling, dispensing or beverage functions

Lonsid specializes in drinking-water equipment rather than only filtration components. Its portfolio includes household and commercial water purifiers, direct-drinking machines, water dispensers, RO systems and appliances with hot and cold water functions.

Its official materials state that the company provides customized OEM and ODM solutions, including product appearance, filtration configurations and branding.

Main product focus

• Countertop hot and cold water dispensers
• Floor-standing water dispensers
• Direct-drinking water appliances
• RO water purifiers
• Commercial drinking-water systems
• Water coolers
• Heating and instant-heating dispensers
• Pod beverage and tea dispensers
• Selected soda and sparkling-water appliances

OEM and ODM capabilities

Lonsid is relevant when the value proposition extends beyond filtration performance into the complete drinking experience.

Potential customization areas include:

• RO or UF filtration configuration
• Heating and cooling functions
• Countertop or floor-standing structures
• User interfaces and water-temperature settings
• Exterior appearance and branding
• Commercial dispensing functions
• Packaging and market-specific documentation

Quality and laboratory support

Lonsid’s official website states that its testing center received CNAS accreditation in 2018 and that its manufacturing processes operate under several quality and environmental management systems.

Buyers should still request documentation for the exact product being sourced, including electrical safety, food-contact materials, filtration claims and market-specific certification.

Typical buyer profile

Lonsid may be suitable for:

• Household appliance brands
• Water dispenser brands
• Hospitality equipment suppliers
• Office drinking-water companies
• Commercial catering suppliers
• Brands combining purification with hot, cold or sparkling water

Potential limitations

Buyers whose priority is a specialized whole-house system, standalone treatment component or conventional low-cost RO kit may find a more focused manufacturer elsewhere in this list.

Why Lonsid is included: It represents the appliance-focused model in which filtration is integrated with heating, cooling and water dispensing.

View Lonsid’s official global website

Which Manufacturer Is Best for Your Project?

The correct manufacturer depends on your sourcing priorities.

What Should You Verify Before Choosing an OEM Water Purifier Factory?

A polished website and a large product catalog are not sufficient evidence of manufacturing suitability.

Before requesting samples or placing an order, verify the following areas.

1. Is the company the actual manufacturer?

Ask which processes are performed internally and which are outsourced. Depending on the product, these may include:

• Product design
• Mold development
• Plastic injection
• Filter production
• RO membrane production
• Electronics assembly
• Finished-product assembly
• Laboratory testing
• Packaging

2. What is the actual OEM or ODM scope?

“OEM available” can mean little more than adding a logo. Confirm whether the supplier supports:

• Private labeling
• Filter configuration changes
• Exterior and CMF customization
• New tooling
• Water-path development
• Electronics and firmware
• Smart faucet and sensor integration
• App or IoT connectivity
• Certification planning

3. Which company owns the molds and design?

For a custom project, specify ownership of:

• Industrial design
• Mechanical drawings
• Molds and tooling
• Firmware and source code
• Mobile applications
• Filter interfaces
• Brand-specific replacement cartridges

4. What does the certification actually cover?

Do not accept “NSF components” or “NSF materials” as proof that the complete purifier is certified.

Ask the supplier:

• Which exact model is certified?
• Which standard applies?
• Which performance claims are included?
• Which replacement filter is listed?
• Who owns the certification?
• Can the listing be found in the certification body’s official database?
• Will your private-label model appear on the listing?

5. How was the filter-life claim determined?

Ask for the test conditions behind any stated filter capacity or replacement interval.

Important variables include:

• Source-water quality
• Flow rate
• Operating pressure
• Influent contaminant concentration
• Media quantity
• Total processed volume
• Sampling points
• End-of-life criteria

6. How will replacement filters be controlled?

The long-term business model may depend more on replacement cartridges than the initial hardware order.

Confirm:

• Filter specifications
• Approved material suppliers
• Batch consistency controls
• Change-notification requirements
• Minimum replacement-filter orders
• Expected supply period
• Tooling and interface ownership

7. Which factory will manufacture the final product?

A supplier may have multiple plants or subcontract some operations. Certification, origin, tariffs and quality control can depend on the actual manufacturing location.

Confirm the production site for:

• Samples
• Pilot production
• Mass production
• 交換用フィルター
• China+1 production, where applicable

Water Purifier Manufacturer RFQ Checklist

Provide the following information to receive a meaningful proposal:

1. Target market: Country or region where the product will be sold
2. Product type: Countertop, undersink, whole-house, dispenser or commercial system
3. Source water: Municipal, well water or another defined source
4. Target contaminants: Chlorine, lead, PFAS, TDS or other specific concerns
5. 技術だ： RO, UF, carbon, ion exchange or a combined system
6. Flow requirement: Liters per minute, GPD or daily volume
7. Filter-life target: Capacity or replacement interval
8. Certification requirements: Applicable safety and performance standards
9. Customization level: Private label, configuration change or full ODM
10. Required features: Heating, cooling, TDS, faucet display, app or IoT
11. Order volume: Sample quantity, initial order and annual forecast
12. Target schedule: Sample, certification, pilot and launch dates

A professional manufacturer should review these requirements before recommending a model.

よくある質問

Are Chinese water purifier manufacturers suitable for private-label brands?

Yes, but capabilities vary significantly. Some suppliers offer only logo and packaging changes, while others can support filtration configuration, structural development, electronics, testing and certification planning. Buyers should match the supplier’s capability to the project’s technical and regulatory risk.

What is the difference between OEM and ODM water purifier manufacturing?

OEM normally means manufacturing a product based on an existing design or buyer-provided specification. ODM involves greater product-development responsibility, which may include industrial design, filtration architecture, structure, electronics, testing and manufacturing preparation.

Which manufacturer is best for a smart undersink RO system?

HisoAir may be relevant for a differentiated smart or premium project, while Kemflo may be appropriate for a larger vertically integrated program. Hidrotek and Canature also offer high-flow RO systems. The final choice should depend on customization depth, annual volume, certification scope and commercial requirements.

Which manufacturer is best for whole-house water filtration?

Canature is particularly focused on water softeners, whole-house filters, valves, tanks and related professional water-treatment components. Kemflo and Hidrotek also offer products relevant to broader residential and commercial filtration.

Which manufacturer is best for hot and cold water dispensers?

Lonsid and Kemflo both publicly present drinking-water appliances with temperature-control and dispensing functions. HisoAir also develops premium countertop water purification appliances. Buyers should compare heating technology, cooling method, filtration configuration, electrical certification and industrial design.

Does an NSF-certified RO membrane make the whole purifier NSF certified?

No. Certification of an RO membrane applies to the listed membrane and its approved scope. Complete-system certification requires evaluation and listing of the finished purifier, its approved components, replacement element and applicable claims.

Can these manufacturers produce outside China?

Some groups publicly describe international manufacturing or China+1 support, but availability varies by product and project. Buyers should verify the exact production country, factory ownership, local content, tooling transfer, certification impact and minimum volume before relying on a China+1 proposal.

How can I verify whether a manufacturer is reliable?

Conduct a factory audit, review business registration, inspect production and testing facilities, verify official certification listings, request project references and place a controlled pilot order. The approved sample, specifications and quality plan should be documented before mass production.

結論

There is no single Chinese water purifier manufacturer that is best for every private-label brand.

The five companies in this guide represent different sourcing models:

• ヒソエア for premium, agile and smart ODM development
• Kemflo for large-scale vertically integrated manufacturing
• Hidrotek for traditional RO systems, membranes and components
• Canature for whole-house treatment, softening and professional components
• Lonsid for filtration combined with heating, cooling and dispensing

The best supplier is not necessarily the company with the largest catalog or the lowest quotation. It is the manufacturer whose engineering responsibility, certification support, production capability and commercial model match the risk level of your project.

Before selecting a factory, ask what it can prove—not only what it can produce.

Official Sources

The company descriptions in this article are based primarily on information published by the manufacturers. Production capacity, certifications and OEM availability should be independently verified during supplier qualification.

• HisoAir Water Purifier Platforms
• Kemflo Water Filtration and OEM/ODM Services
• Ningbo Hidrotek Company Profile
• Hidrotek RO System and OEM/ODM Information
• Canature Company Profile
• Canature Product Portfolio
• Lonsid Global Website
• Lonsid OEM/ODM and Company Information

Editorial note: Product portfolios, manufacturing locations, certification listings and commercial policies can change. Verify all material claims directly with the manufacturer and the applicable certification body before making a sourcing decision.

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