WFW UNDER-SINK DRINKING WATER FILTRATION
WFW Twin Economy Under-Sink Water Filter System
The WFW Twin Economy Under-Sink Water Filter System uses Water Filter World's traditional twin-housing design with two standard 10" × 2.5" replaceable cartridges.
The first stage uses a sediment pre-filter for dirt, rust, sand, silt and general particulate matter. The second stage uses a carbon cartridge, with Basic, Mid-Grade and High-Grade filtration options available from Water Filter World depending on the treatment level required.
The classic housing design uses standard-format replacement cartridges rather than a proprietary quick-change cartridge, making it a practical option where straightforward servicing and commonly available cartridge sizes are preferred.
Quick answer:
the WFW Twin Economy is a two-stage under-sink drinking-water system using a sediment cartridge first and your selected carbon cartridge second. Water Filter World's current classic twin range offers a 1 micron Basic Grade, 0.5 micron Mid-Grade and 0.5 micron High-Grade carbon option, with different treatment claims for each grade.
SYSTEM AT A GLANCE
WFW Twin Economy Key Details
2 Stages
Sediment + Carbon
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10" × 2.5"
Standard Cartridges
3 Grades
Carbon Options
Under-Sink
Drinking Water System
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HOW IT WORKS
Two Dedicated Filtration Stages
Stage 1 – Sediment Pre-Filter
The first cartridge reduces dirt, rust, sand, silt and general suspended sediment before water reaches the carbon treatment stage.
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Stage 2 – Carbon Filtration
The second cartridge provides carbon treatment. The exact micron rating and reduction capabilities depend on whether Basic, Mid-Grade or High-Grade filtration is selected.
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CLASSIC TWIN-HOUSING DESIGN
Standard Cartridges Without Proprietary Lock-In
Water Filter World describes its current Classic Twin range as a traditional under-sink filtration system designed to be straightforward to service.
Both housings accept standard 10" × 2.5" cartridges. When replacement is required, the housings are opened and the individual cartridges are changed rather than replacing a proprietary filter head or sealed cartridge assembly.
This design also allows the second-stage carbon grade to be selected around the treatment requirements of the household.
STAGE 1
Sediment Pre-Filtration
Water Filter World specifies a pre-sediment cartridge as the first stage across its current Classic Twin under-sink range.
Dirt
Captures suspended dirt before it reaches the second-stage carbon cartridge.
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Rust
Helps reduce particulate rust carried through the incoming water supply.
Sand
Provides mechanical filtration for suspended sand particles.
Silt
Reduces suspended silt and similar particulate material.
Carbon Protection
Pre-filtration helps reduce particulate loading on the downstream carbon media.
Replaceable
The cartridge can be replaced independently during routine system maintenance.
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CHOOSE YOUR CARBON GRADE
Basic, Mid-Grade or High-Grade Filtration
| Carbon Option |
Micron Rating |
WFW Listed Treatment |
| Basic Grade |
1 micron |
Chlorine, unwanted taste, colour and odour |
| Mid-Grade |
0.5 micron |
Chlorine, unwanted taste, colour and odour, plus Giardia and Cryptosporidium cyst reduction |
| High-Grade |
0.5 micron |
Chlorine, unwanted taste, colour and odour, lead, heavy metals, Giardia and Cryptosporidium, plus PFOS and PFOA as listed by WFW |
Choose the grade by its actual treatment specification.
High-Grade treatment claims should not be applied to the Basic or Mid-Grade cartridges where Water Filter World does not list the same reduction capability.
BASIC GRADE
1 Micron Carbon for Everyday Chlorine, Taste & Odour Treatment
Water Filter World's Basic-Grade 1 micron 10" × 2.5" carbon cartridge is intended primarily for households concerned with chlorinated or unpleasant-tasting water.
WFW lists the Basic Grade cartridge for treatment of:
- Chlorine
- Unwanted taste
- Unwanted colour
- Unwanted odour
This is the straightforward carbon option where the additional reduction capabilities of the finer Mid-Grade or High-Grade cartridges are not required.
MID-GRADE
0.5 Micron Carbon with Additional Cyst Reduction
The current WFW Mid-Grade Twin configuration uses a 0.5 micron carbon cartridge.
In addition to chlorine and unwanted taste, colour and odour treatment, Water Filter World lists the Mid-Grade cartridge for reduction of Giardia and Cryptosporidium cysts.
HIGH-GRADE
0.5 Micron Carbon with WFW's Broader Treatment Range
The High-Grade Twin configuration also uses a 0.5 micron carbon cartridge, with specialised treatment media for a broader range of manufacturer-listed contaminants.
WFW currently lists the High-Grade cartridge for:
- Chlorine
- Unwanted taste, colour and odour
- Lead
- Heavy metals
- Giardia and Cryptosporidium cysts
- PFOS and PFOA
Specific reduction performance depends on the cartridge, operating conditions and incoming water. Manufacturer-listed treatment should not be interpreted as universal removal of every concentration of every substance.
WHAT'S INCLUDED
Current WFW Classic Twin Package
Water Filter World currently lists the following components with its Classic Twin under-sink systems:
- Twin standard filter housings
- Pre-sediment cartridge
- Selected carbon cartridge
- Stainless steel drinking-water faucet
- Plumbing fittings supplied with the system
- Connection hose
Additional plumbing modifications, cabinet alterations or non-standard installation work may still be required depending on the property.
OPTIONAL ALKALISER
Pi Bio Life Alkaliser Upgrade
Water Filter World offers its Pi Bio Life Alkaliser as an optional mineralisation stage for compatible drinking-water filtration arrangements.
WFW currently describes the Pi Bio Life cartridge as a mineral cartridge designed to re-mineralise filtered water and raise its pH to approximately 8.5–9.5.
The cartridge uses layered mineral media and is marketed by WFW for customers who specifically prefer alkaline, mineralised drinking water.
An alkaliser changes the water treatment configuration.
Confirm compatibility, cabinet space, plumbing arrangement and the exact cartridge supplied before adding an alkaliser to the Twin Economy system.
UNDER-SINK INSTALLATION
Designed for Dedicated Drinking-Water Filtration
The Twin Economy system is intended to be installed inside the kitchen cabinet and connected to the cold-water supply.
The current WFW Classic Twin range includes a dedicated stainless steel drinking-water faucet, allowing filtered water to be supplied separately from the normal hot and cold kitchen mixer.
- Suitable under-sink cabinet space
- Accessible cold-water connection
- Serviceable isolation point
- Position for the dedicated filtered-water faucet
- Room to unscrew both housings during servicing
- Accessible location for future cartridge replacement
INSTALLATION OPTIONS
Supply Only or Professional Installation
Supply Only
Order the WFW Twin Economy for delivery to supported Australian locations where you already have a suitable installation arrangement.
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Select Your Grade
Choose Basic, Mid-Grade or High-Grade carbon filtration according to the treatment functions you require.
Supply & Installation
Professional under-sink installation may be available in eligible Brisbane and Gold Coast service areas.
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MAINTENANCE
Standard Housings Make Cartridge Replacement Straightforward
The Classic Twin system is designed so each cartridge can be removed from its housing and replaced individually.
Water Filter World's maintenance instructions for its economy under-sink housings specify:
- Turn off the under-sink stop cock
- Open the filter faucet to release pressure
- Unscrew the filter housing anti-clockwise
- Remove the used cartridge
- Install the correct replacement cartridge
- Reassemble the housing correctly
- Restore the water supply gradually
- Flush the replacement cartridge for approximately 7 minutes
- Check the housings and connections for leaks
REPLACEMENT CARTRIDGES
Standard 10" × 2.5" Cartridge Format
One of the key features of the WFW Classic Twin design is the use of standard 10" × 2.5" cartridges.
Water Filter World currently lists replacement sediment cartridges in multiple micron ratings and separate Basic, Mid-Grade and High-Grade carbon cartridges for its economy systems.
Keep the filtration stages in the correct order.
Sediment filtration should remain upstream of the carbon cartridge so suspended particulate material is reduced before water reaches the carbon media.
SYSTEM SPECIFICATIONS
WFW Twin Economy Technical Details
| Specification |
Detail |
| Brand |
Water Filter World / WFW |
| Application |
Under-sink drinking-water filtration |
| System Type |
Traditional twin-housing cartridge system |
| Cartridge Format |
Standard 10" × 2.5" |
| Stage 1 |
Pre-sediment filtration |
| Basic Carbon |
1 micron |
| Mid-Grade Carbon |
0.5 micron |
| High-Grade Carbon |
0.5 micron |
| Filtered-Water Faucet |
Stainless steel faucet listed with current Classic Twin systems |
| Pi Bio Life Alkaliser |
Optional WFW upgrade for compatible drinking-water configurations |
| Pi Bio Life pH |
Approximately 8.5–9.5 according to WFW |
CERTIFICATION
Confirm Certification Against the Exact System Supplied
Water Filter World specifically identifies some of its newer compact systems as WaterMark certified, but certification should be confirmed against the exact Twin Economy / Classic Twin model and installation components being supplied.
If WaterMark documentation is required for a particular installation, check the applicable product documentation before ordering rather than assuming every WFW under-sink configuration carries the same certification.
BEFORE ORDERING
Check These Details First
- You want a two-stage under-sink system
- You have selected Basic, Mid-Grade or High-Grade carbon filtration
- You have suitable cabinet space for twin standard housings
- You have room below the housings for future servicing
- A suitable cold-water connection is available
- You have chosen the preferred filtered-water faucet arrangement
- Any optional Pi Bio Life alkaliser has been allowed for in the installation
- The selected cartridge treatment functions match your requirements
COMMON QUESTIONS
Questions About the WFW Twin Economy Under-Sink System
What Size Cartridges Does It Use?
The current WFW Classic Twin range uses standard 10" × 2.5" cartridges.
What Is the First Filtration Stage?
A pre-sediment cartridge for dirt, rust, sand, silt and general particulate matter.
What Is the Second Stage?
A carbon cartridge selected in Basic, Mid-Grade or High-Grade filtration.
What Does the Basic Grade Treat?
Water Filter World lists the 1 micron Basic Grade cartridge for chlorine and unwanted taste, colour and odour treatment.
What Does the Mid-Grade Treat?
The 0.5 micron Mid-Grade adds manufacturer-listed Giardia and Cryptosporidium cyst reduction to chlorine, taste, colour and odour treatment.
What Does the High-Grade Treat?
WFW lists its 0.5 micron High-Grade cartridge for chlorine, taste, colour and odour, lead, heavy metals, Giardia and Cryptosporidium, PFOS and PFOA.
Does Every Version Remove Heavy Metals?
No. Heavy-metal reduction is associated with WFW's High-Grade cartridge and should not be applied to the Basic or Mid-Grade configuration.
Is a Drinking-Water Tap Included?
Water Filter World's current Classic Twin product pages list a stainless steel filtered-water faucet with the system.
Are Plumbing Fittings Included?
WFW lists plumbing fittings and a connection hose with its current Classic Twin package. Site-specific plumbing alterations may still be additional.
Can I Add an Alkaliser?
Water Filter World offers the Pi Bio Life Alkaliser for compatible drinking-water systems. Confirm space and compatibility before adding it to this installation.
What pH Does the Pi Bio Life Cartridge Produce?
WFW currently describes the Pi Bio Life upgrade as producing approximately pH 8.5–9.5.
Does the Alkaliser Provide Health or Detoxification Benefits?
The practical product function is mineralisation and pH adjustment. This listing does not make medical, detoxification or hydration-performance claims.
Are the Filters Proprietary?
No. The Classic Twin uses standard 10" × 2.5" cartridge housings rather than a proprietary sealed-cartridge format.
How Do I Change the Filters?
Isolate the water, release pressure through the filtered-water faucet, open the housings, replace the cartridges, reassemble and flush. WFW instructs economy under-sink users to flush for approximately 7 minutes after replacement.
Can Installed Today Install It?
Professional under-sink filtration installation may be available in eligible Brisbane and Gold Coast service areas, subject to cabinet access and existing plumbing.
Can I Order It Without Installation?
Yes. Supply-only ordering is available for supported Australian delivery locations.
WHY INSTALLED TODAY
Choose the Filtration Grade, Then Choose How You Want It Supplied
Supply Only
Purchase the WFW Twin Economy without installation where you already have a suitable installer or servicing arrangement.
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Clear Filtration Choices
Basic, Mid-Grade and High-Grade treatment capabilities are kept separate so you can choose the filtration level that matches your requirements.
Installation Capability
Installed Today can also support eligible local installations where cabinet space, plumbing access and the selected filtration configuration are suitable.
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FINAL CHECK
Is the WFW Twin Economy Under-Sink System Right for Your Kitchen?
The WFW Twin Economy Under-Sink Water Filter System is designed for customers wanting a straightforward twin-housing drinking-water filter using standard 10" × 2.5" replacement cartridges.
All current Classic Twin configurations use a sediment pre-filter first. You can then select Water Filter World's 1 micron Basic Grade, 0.5 micron Mid-Grade or 0.5 micron High-Grade carbon treatment depending on the reduction capabilities required.
The current WFW package also lists a stainless steel filtered-water faucet, plumbing fittings and connection hose. An optional Pi Bio Life mineralisation cartridge can be considered where alkaline water is specifically wanted, but its compatibility and additional cabinet-space requirements should be confirmed before ordering.
