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HW-S6 twist-lock undersink water filter with replaceable cartridge

HW-S6 Twist-Lock Undersink Water Filter

カテゴリー Undersink Water Purifier

A compact, high-flow direct-connect filtration platform designed for residential kitchens, private-label water-treatment programs, and scalable single, series, or parallel system configurations.

  • 1.5 GPM rated flow for convenient daily drinking-water use
  • Compact vertical design preserves valuable cabinet space
  • Keyed twist-lock cartridge simplifies routine replacement
  • 3/8-inch push-fit connections support faster installation
  • Single, series, and parallel layouts for flexible project development
OEM / ODM · Private Label · Certification Coordination
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商品説明

Compact Undersink Filtration for Everyday Drinking Water

The HW-S6 is a compact undersink drinking-water filtration platform developed for residential kitchens, apartments, and premium housing projects.

Its slim vertical structure helps preserve cabinet space, while the keyed twist-lock cartridge and 3/8-inch push-fit connections simplify installation and routine filter replacement.

  • Compact vertical undersink structure
  • Direct connection to a filtered-water faucet
  • 1.5 GPM rated drinking-water flow
  • Keyed twist-lock replacement cartridge
  • Suitable for OEM and ODM development
HW-S6 undersink water filter installed in a residential kitchen
1.5 GPM Rated Drinking-Water Flow
3/8 Inch Push-Fit Inlet and Outlet
Up to 1 Year Recommended Filter Life
Twist-Lock Quick Cartridge Replacement
Actual filter life and flow performance depend on feed-water quality, water pressure, daily consumption, and the selected cartridge configuration.

Clean Water Without Taking Over the Cabinet

The compact vertical design fits beneath standard kitchen cabinets while keeping the replacement cartridge accessible for routine maintenance.

HW-S6 residential kitchen undersink water filter installation

Residential Kitchen Installation

  • Clean and concealed undersink installation
  • Direct connection to a filtered-water faucet
  • Easy access for cartridge replacement
  • Suitable for drinking and food preparation
Compact HW-S6 water filter installed under an apartment kitchen sink

Compact Kitchen and Apartment Installation

  • Compact vertical structure
  • Minimal cabinet space required
  • Clean and hidden installation
  • Suitable for residential upgrade projects

Twist, Lock, and Replace

The keyed twist-lock interface connects the replacement cartridge directly to the filter head, reducing complicated assembly steps during cartridge replacement.

A visible lock and unlock indicator helps installers confirm that the cartridge is positioned correctly.

  • Keyed replacement-cartridge interface
  • Visible lock and unlock indicator
  • Reduced replacement steps
  • Accessible undersink maintenance
Three-step twist-lock cartridge replacement process for the HW-S6 water filter
1

整列

Align the cartridge connections with the filter-head interface.

2

Insert

Push the replacement cartridge upward into the filter head.

3

Twist and Lock

Rotate the cartridge until the indicator reaches the secured position.

Contaminant-Reduction Options

The HW-S6 platform can be configured with cartridges developed around different drinking-water contaminant-reduction requirements.

CTO
Chlorine Taste and Odor
Pb
Lead
CY
Cysts
AS
Asbestos
TU
Turbidity
PF
Total PFAS
MP
Microplastics
OEM
Custom Media Options
Performance claims depend on the selected cartridge, certified capacity, test conditions, and final product listing.

Integrated Structure Designed to Reduce Leakage Points

HW-S6 filter head keyed twist-lock cartridge and push-fit connection structure
  • Integrated filter-head construction
  • Precision spin-welded cartridge structure
  • Dual O-ring sealing design
  • Keyed cartridge connection
  • Lock and unlock indicator
  • 3/8-inch push-fit inlet and outlet

One Platform, Multiple System Configurations

The modular HW-S6 filter-head platform can support single, series, and parallel configurations according to the required filtration stages, system capacity, and target flow rate.

Single series and parallel HW-S6 water filtration system configurations

Single-Filter Configuration

  • Compact standard installation
  • Simplified routine maintenance
  • Lower system complexity
  • Suitable for residential kitchens

Series Configuration

  • Supports multi-stage filtration
  • Combines different filtration media
  • Can extend total system capacity
  • Final flow depends on cartridge selection

Parallel Configuration

  • Supports a higher initial flow rate
  • Shares water flow between cartridges
  • Suitable for higher-demand applications
  • Flexible project-level configuration

Developed for OEM, ODM, and Private-Label Programs

HisoAir supports water-treatment brands, healthy-home companies, distributors, appliance manufacturers, and housing-project suppliers in adapting the HW-S6 platform for different markets.

  • Private-label branding
  • Filter-head appearance options
  • Cartridge media configuration
  • Single, series, or parallel layout
  • Installation-kit development
  • Packaging customization
  • Technical documentation
  • Certification coordination
HW-S6 private-label undersink water filter product options
HisoAir water filtration product engineering and development process
HW-S6 direct-connect water filter installation kit and packaging

よくある質問

Is the HW-S6 a water softener?

No. The HW-S6 is an undersink drinking-water filtration platform designed for contaminant-reduction cartridges, rather than whole-house water-hardness removal.

What is the rated flow rate?

The supplied product data lists a rated flow rate of 1.5 GPM. Actual flow depends on feed-water pressure, temperature, cartridge media, and system configuration.

How is the cartridge replaced?

The replacement cartridge is aligned with the filter head, pushed upward, and rotated until the twist-lock indicator reaches the secured position.

What connection size does the system use?

The standard HW-S6 platform uses 3/8-inch push-fit inlet and outlet connections.

How long does the replacement cartridge last?

The supplied product data lists a recommended filter life of up to one year. Actual service life depends on feed-water quality, daily consumption, and contaminant loading.

Can several cartridges be connected together?

Yes. The platform can support single, series, and parallel configurations according to filtration, capacity, and flow requirements.

Which certification standards are listed?

The supplied product data lists NSF/ANSI 42, 53, 401, and 372 through IAPMO. The exact certified claims, cartridge model, tested capacity, and listing scope must be confirmed for the final configuration.

Can HisoAir provide private-label customization?

The platform can support branding, appearance, cartridge configuration, system layout, packaging, documentation, and certification coordination according to project requirements.

仕様

HW-S6 Specifications

モデル HW-S6
Product type Under-sink POU filtration platform
Inlet and outlet 3/8-inch push-fit
System dimensions 105 x 114 x 558.8 mm
Replacement filter Dia. 80 x 428 mm
Rated flow 1.5 GPM
Filter life Up to 1 year*
Feed pressure 30-125 psi*
Operating temperature 4.4-37 degrees C
認証 Configuration-specific documents on request
 
 
 
 
 
Review note: Rated capacity is omitted because the source lists both 4,000 L and 3,000 gallons. Certification scope and the 150 psi claim must also be confirmed before publication.

当社の空気清浄機を選ぶ理由

High-Performance Air Purification
Advanced Filtration Options
99.9%バクテリア
除去率
高CADR
(クリーンエア供給率）
H13/H14 HEPA Filtration Options
Optional 270–280 nm UVC Module
H14 H13 extended filter life
lifespan HEPA filters
Third-Party Tested Filtration Performance

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Contaminant Engineering•3 min read

PFAS Water Filtration Technologies Explained: Carbon, Resin & RO

Key Takeaway:

PFAS reduction depends on the specific compounds present, treatment media, contact time, water chemistry, and system design. Activated carbon, ion exchange, and Reverse Osmosis address PFAS through different mechanisms.

PFAS are a large family of persistent fluorinated compounds that can occur in drinking-water supplies. Their treatment behavior varies significantly by molecular structure, chain length, functional group, concentration, and the chemistry of the source water.

Granular Activated Carbon (GAC) removes PFAS primarily through adsorption. It is generally more effective for many longer-chain PFAS, while shorter-chain compounds tend to break through more quickly. Carbon performance depends on media properties, Empty Bed Contact Time (EBCT), competing organic matter, loading, and replacement frequency.

Ion-exchange resins use charged functional sites to capture many PFAS compounds. Properly selected anion-exchange media can provide high capacity and may perform better than conventional activated carbon for some shorter-chain PFAS, although performance still depends on water chemistry and competing ions.

Reverse Osmosis (RO) uses membrane separation rather than adsorption. Properly designed RO systems can provide broad reduction across many PFAS compounds as well as dissolved salts and other contaminants. Unlike carbon or resin, however, RO also produces a concentrate stream that must be managed.

No single technology should be selected from a PFAS label alone. System design should consider which PFAS compounds are present, their concentrations, required reduction targets, flow rate, media life, and the applicable third-party certification or validation requirements.

HisoAir Water Technical Series
Product Discovery•3 min read

How to Choose an Under-Sink Water Purifier for Modern Kitchens

Key Takeaway:

Match the treatment technology to your water quality first, then evaluate cabinet space, faucet configuration, flow rate, drain and power requirements, and filter replacement needs.

Choosing an under-sink water purifier starts with water chemistry. Carbon filtration is well suited to chlorine, taste, odor, and many organic contaminants, while Reverse Osmosis is more appropriate when dissolved salts, fluoride, nitrates, or broader dissolved contaminants need to be reduced.

For compact kitchens, tankless RO systems eliminate the conventional storage tank and can significantly reduce the space required under the sink. However, membrane capacity stated in GPD does not directly equal faucet flow. When comparing systems, check the actual dispensing flow rate, inlet-pressure requirement, recovery ratio, and whether a booster pump is required.

Installation architecture also matters. Many RO systems require a drain connection, electrical power, and either a dedicated drinking-water faucet or a compatible multi-function faucet. High-flow carbon systems can often connect directly to the existing cold-water line with a simpler installation, but pressure drop and available faucet flow should still be verified.

RO also removes much of the naturally occurring dissolved mineral content. Where taste or mineral balance is a priority, a post-RO remineralization stage can be added. Filter life should be evaluated by both rated capacity and local water quality rather than replacement time alone.

The right system is therefore not simply the smallest or highest-GPD model. It is the configuration that matches the target contaminants, available cabinet space, desired faucet setup, peak dispensing demand, and maintenance expectations.

HisoAir Water Technical Series
Water Quality•2 min read

What Does TDS Mean in Drinking Water? Measurement vs Contaminant Reality

Key Takeaway:

A TDS meter estimates the overall concentration of dissolved ionic substances from electrical conductivity. It cannot identify specific contaminants or determine whether water is chemically safe.

Total Dissolved Solids (TDS) refers to the combined concentration of dissolved substances in water. Most handheld TDS meters do not measure TDS directly. Instead, they measure electrical conductivity (EC) and convert that reading into an estimated parts-per-million (ppm) value.

This means a TDS reading can indicate how much dissolved ionic material is present, but not what that material actually is. Calcium, magnesium, sodium, nitrates, and other dissolved ions can all contribute to conductivity, yet a simple TDS meter cannot distinguish between them.

TDS meters are also not suitable for detecting trace contaminants such as PFAS, many VOCs, pesticides, pharmaceuticals, or disinfection byproducts. These substances may be present at concentrations far below the level needed to noticeably change electrical conductivity.

A low TDS reading therefore does not guarantee safe drinking water, and a higher TDS reading does not automatically indicate contamination. Water-treatment decisions should be based on laboratory testing for specific contaminants of concern rather than TDS alone.

HisoAir Water Technical Series
Technology Selection•2 min read

RO vs UF Water Filtration: Understanding Pore Sizes & Dissolved Minerals

Key Takeaway:

Ultrafiltration can reduce bacteria, turbidity, and suspended particles while retaining most naturally occurring dissolved minerals. Reverse Osmosis provides much broader reduction of dissolved salts and smaller contaminants.

Ultrafiltration (UF) typically uses hollow-fiber membranes with pore sizes in the approximate 0.01–0.1 micron range. These membranes physically retain turbidity, suspended solids, colloids, and many microorganisms while allowing dissolved minerals and salts to remain in the water.

Reverse Osmosis (RO) operates at a much finer separation level. Unlike UF, RO can substantially reduce dissolved ions such as sodium, calcium, fluoride, nitrates, and other contributors to total dissolved solids (TDS). This makes RO more suitable when dissolved-salt reduction is a primary treatment objective.

UF generally requires less system pressure and produces little or no continuous concentrate stream in many point-of-use configurations. RO typically requires greater pressure and produces a reject-water stream, but delivers broader contaminant reduction.

For water with acceptable TDS and mineral content, UF can be a simpler mineral-retaining treatment option. Where dissolved salts, fluoride, nitrates, or broader dissolved contaminants are a concern, RO is generally the more appropriate technology.

HisoAir Water Technical Series
Technology Selection•4 min read

Carbon Block vs Reverse Osmosis: Which Fits Your Need?

Key Takeaway:

Choose RO for dissolved inorganic salts and heavy metals; choose Carbon Block for chemical taste/odor, no wastewater, and high line-pressure flow.

Reverse Osmosis (RO) and Carbon Block filtration represent two fundamentally different treatment methods: membrane separation and adsorption. Understanding these differences helps determine which technology is better suited to a specific water-quality requirement.

Reverse Osmosis uses a semi-permeable membrane with pore sizes of approximately 0.0001 microns. It can significantly reduce dissolved inorganic contaminants such as TDS, fluoride, nitrates, and certain heavy metals. Because water must be forced through the membrane, RO systems require sufficient pressure or a booster pump and generate a concentrated wastewater stream.

Carbon Block filtration relies primarily on adsorption through compressed activated carbon, commonly with nominal pore sizes around 0.5–5 microns. It is highly effective for chlorine, chloramines, VOCs, taste, and odor, while allowing substantially higher direct-flow rates without producing wastewater.

From an operating perspective, Carbon Block systems are generally simpler, require less energy, and avoid the water loss associated with RO. RO involves higher system complexity and operating cost, but provides substantially broader reduction of dissolved contaminants that Carbon Block alone cannot address.

HisoAir Water Technical Series

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