The WFW Twin 20" Big Blue + UV Whole Home Water Filter System combines two large-format 20" × 4.5" Big Blue filtration stages with a separate whole-house ultraviolet treatment stage.
Water Filter World specifies the Twin Big Blue platform with a sediment cartridge in stage one and a carbon cartridge in stage two, together with dual pressure gauges, brass ports and a heavy-duty mounting bracket.
The UV stage is positioned downstream of the cartridge filtration and provides a separate treatment step for compatible whole-house applications. The exact carbon grade and UV flow option should be confirmed against the configuration selected when ordering.
The first cartridge provides physical filtration of dirt, rust, sand, silt and other suspended particulate material.
The second cartridge provides carbon treatment, with the exact micron rating and treatment range depending on the carbon option selected.
Filtered water then passes through the whole-house UV system as the final treatment stage.
The Twin 20 Big Blue platform is designed for whole-house use rather than a single drinking-water tap.
The two large cartridge housings provide substantial filtration capacity before the water reaches the UV chamber, allowing different treatment functions to be separated into dedicated stages.
Correct sizing still depends on the incoming water source, available pressure, cartridge selection, household demand and the flow rating of the UV unit supplied.
Water Filter World's Twin Big Blue systems use a sediment cartridge in the first housing.
The manufacturer offers several 20" × 4.5" sediment cartridge options, including 5 micron, washable 5 micron, 20 micron and washable 20 micron versions.
Captures suspended dirt before it reaches the carbon and UV stages.
Reduces particulate rust carried through the incoming water supply.
Provides physical filtration of suspended sand, silt and similar material.
Uses Water Filter World's large-format Big Blue cartridge size.
The exact sediment micron rating depends on the cartridge selected for the system.
Helps reduce particulate loading before downstream carbon and UV treatment.
Water Filter World currently offers different carbon-media choices for its Twin 20 Big Blue platform.
The basic whole-house configuration uses a 10 micron carbon cartridge specified for chlorine reduction and improvement of unwanted taste, colour and odour.
The manufacturer's high-grade option uses a 0.5 micron carbon cartridge and is listed for additional treatment capabilities including Giardia and Cryptosporidium cysts, lead and heavy metals under the cartridge's specified conditions.
Both Water Filter World carbon options are intended to provide carbon treatment, but the exact reduction claims depend on the cartridge selected.
Do not apply the high-grade cartridge's claims to the basic carbon configuration.
Water Filter World offers a standard Whole House UV unit rated at up to 48 litres per minute for installation on the main line to the house.
The manufacturer also offers separate 96 L/min high-flow and 192 L/min maximum-flow UV units for applications requiring greater flow capacity.
Water Filter World specifically notes that UV performance depends on contact time and turbidity.
This is why sediment and carbon filtration are positioned before the UV chamber. Reducing suspended material before UV treatment helps provide more suitable conditions for ultraviolet exposure.
The exact microorganism-reduction performance should be based on the selected UV model, actual operating flow and the incoming water conditions.
Water Filter World specifies a 12-month lamp life for its UV range.
A UV lamp can continue to illuminate after its effective operating period, so lamp replacement should follow the applicable manufacturer interval rather than waiting for visible lamp failure.
The quartz sleeve should also be inspected and kept clean so deposits do not interfere with UV transmission.
Water Filter World lists several construction details for its current Twin 20" × 4.5" Big Blue systems.
The manufacturer specifies 100% BPA-free plastics for the filtration assembly.
The manufacturer lists the Big Blue housings as UV stabilised.
Water Filter World lists a 90 PSI burst-pressure rating for the current Twin Big Blue system.
Solid brass ports are included in the manufacturer's current Twin Big Blue package.
Two gauges allow pressure to be monitored across the filtration assembly.
A heavy-duty mounting bracket forms part of the current manufacturer package.
Water Filter World lists the Twin Big Blue filtration assembly at approximately:
Allow additional installation and service clearance around the assembly, particularly beneath the housings so the 20-inch cartridges can be removed.
Water Filter World states that its whole-house systems are hand built and pressure tested in Sydney using a combination of American, British and Australian components.
The manufacturer also states that its whole-house filtration assemblies are built to comply with applicable Australian WaterMark requirements and use independently tested components.
The Twin Big Blue assembly includes dual pressure gauges.
Monitoring pressure before and after filtration can help identify increasing restriction as cartridges load with sediment or reach the end of their practical service period.
Pressure readings should be assessed together with household flow and the operating limits of the housings, cartridges and UV equipment.
Water Filter World lists its high-grade carbon option as suitable for town-water applications, including chlorine and taste-and-odour treatment.
The manufacturer also lists its high-grade Twin Big Blue carbon configuration for tank-water applications and offers whole-house UV as an additional treatment stage.
Water Filter World recommends additional pre-treatment and settling for river and dam sources before its Twin Big Blue and UV equipment are used.
The standard Twin Big Blue + UV configuration does not automatically provide every possible water-treatment function.
| Specification | Detail |
|---|---|
| Brand | WFW / Water Filter World |
| Application | Whole-house / point-of-entry filtration |
| Housing Configuration | Twin 20" × 4.5" Big Blue |
| Stage 1 | Sediment cartridge |
| Stage 2 Basic Option | 10 micron basic-grade carbon cartridge |
| Stage 2 High-Grade Option | 0.5 micron high-grade carbon cartridge |
| Pressure Gauges | Dual gauges included |
| Ports | Brass ports |
| Housing Material | 100% BPA-free plastics stated by manufacturer |
| Housing Treatment | UV stabilised |
| Listed Burst Pressure | 90 PSI |
| Filtration Assembly Dimensions | Approx. 700 mm H × 400 mm W × 200 mm D |
| Standard WFW Whole House UV | 48 L/min |
| Higher-Flow WFW UV Options | 96 L/min and 192 L/min models available separately |
The Big Blue housings themselves do not determine the final usable whole-house flow.
The complete installation is limited by the combination of the cartridge stages, water pressure, pipework and the UV unit.
Water Filter World's standard Whole House UV is listed at 48 L/min.
A separate high-flow unit is listed at 96 L/min.
A separate maximum-flow model is listed at 192 L/min.
Confirm which UV unit is supplied with the product package before relying on a particular flow figure.
There is not one universal replacement interval for every carbon and sediment option available with the Twin Big Blue system.
Replace when required by the cartridge specification, sediment loading, pressure drop and water usage.
Replace according to the selected carbon grade, treatment demand and practical cartridge condition.
Water Filter World specifies a 12-month lamp life across its UV range.
Inspect and clean according to the supplied UV maintenance instructions so deposits do not reduce UV transmission.
Inspect O-rings and sealing surfaces whenever the Big Blue housings are opened.
Use changes in pressure and household flow as indicators that the cartridges may be becoming restricted.
The ultraviolet stage contains electrical equipment as well as glass lamp and quartz components.
Handle the UV lamp and quartz sleeve carefully and follow the instructions supplied with the exact WFW UV unit.
Order the WFW Twin 20" Big Blue + UV system for delivery to supported Australian locations where you already have a suitable installer.
Confirm the sediment cartridge, carbon grade and UV capacity required for the property before ordering.
Professional installation may be available in eligible Brisbane and Gold Coast service areas, subject to site access and installation requirements.
It means the system uses two large 20" × 4.5" Big Blue filter housings.
A sediment cartridge is installed as the first filtration stage.
A carbon cartridge is installed second. Water Filter World currently offers basic 10 micron and high-grade 0.5 micron carbon options for its Twin Big Blue platform.
Yes. Water Filter World lists chlorine reduction as a function of both its basic and high-grade carbon configurations.
Yes. The manufacturer's carbon configurations are listed for unwanted taste, colour and odour treatment.
Yes. This product configuration adds whole-house UV treatment downstream of the Twin Big Blue filtration stages.
Water Filter World's standard Whole House UV unit is listed at 48 L/min. Higher-flow 96 L/min and 192 L/min UV units are also available separately.
No. Sediment filtration, carbon filtration and ultraviolet treatment perform different functions and are intended to work as separate stages.
Water Filter World specifies a 12-month lamp life for its UV range.
Water Filter World lists the Twin Big Blue filtration assembly with a 90 PSI burst-pressure rating.
Yes. The manufacturer lists the Big Blue housings as UV stabilised.
Water Filter World states that the filtration system uses 100% BPA-free plastics.
Yes. The current Twin Big Blue package includes dual pressure gauges.
Yes. Water Filter World lists brass ports as part of the current system assembly.
The manufacturer lists approximately 700 mm high × 400 mm wide × 200 mm deep.
No dedicated scale-control stage is included in the standard Twin Big Blue + UV configuration. A separate antiscale system or additional treatment stage is required where scale control is needed.
Purchase the WFW system without installation where you already have your own suitable installer or service arrangement.
The sediment, carbon and UV stages are identified separately so the system can be matched to the property's actual treatment requirements.
Installed Today can also support eligible local installations where the plumbing, flow, electrical and access requirements are suitable.
The WFW Twin 20" Big Blue + UV Whole Home Water Filter System combines two large 20" × 4.5" filtration stages with downstream ultraviolet treatment.
Water Filter World's current Twin Big Blue platform includes a sediment stage, your selected carbon grade, dual pressure gauges, brass ports and a heavy-duty mounting bracket. The manufacturer lists the filtration assembly with BPA-free plastics, UV-stabilised housings, a 90 PSI burst rating and dimensions of approximately 700 × 400 × 200 mm.
Before ordering, confirm the sediment micron rating, basic or high-grade carbon option and the exact UV unit required for your household flow. Water Filter World's standard Whole House UV is rated at 48 L/min, while separate 96 L/min and 192 L/min versions are available for higher-flow applications.
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Same Day Delivery: Available in Brisbane and Gold Coast on select units ordered before 8:00am
Express Delivery: 1–4 business days
Standard Delivery: 2–8 business days
Same day delivery is available for selected hot water systems in Brisbane and Gold Coast metro areas when ordered before 8:00am, subject to stock availability, delivery capacity and suitable transport conditions.
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