The WFW Triple 20" Big Blue with AntiScale + UV is a whole-house treatment system combining three large-format 20-inch filtration stages with a dedicated scale-control cartridge and an ultraviolet treatment stage.
The listed filtration arrangement uses a 5 micron sediment stage, a One Stop Plus scale-control cartridge and a carbon block stage, followed by UV treatment.
This combination is intended to address suspended sediment, provide carbon treatment for chlorine and unwanted taste or odour, help manage mineral scale formation and add a separate UV treatment stage before water is distributed through the property.
A 5 micron sediment cartridge provides the first filtration stage for suspended dirt, rust, sand, silt and similar particulate material.
The listed configuration uses a One Stop Plus scale-control cartridge to help manage mineral scale formation.
A carbon block stage provides chlorine, unwanted taste and odour treatment before water continues to the UV system.
Where a replacement scale-control cartridge has superseded the originally supplied One Stop Plus model, confirm the current replacement cartridge and required stage order before servicing.
The system uses separate treatment stages rather than asking one cartridge to perform every function.
The first stage handles suspended sediment, the antiscale stage addresses mineral scale formation, the carbon stage provides chlorine and unwanted taste-and-odour treatment, and the UV system provides an additional downstream treatment process.
Correct performance depends on the cartridge models, water conditions, system flow and UV equipment all being matched to the application.
The first filtration stage is intended to reduce suspended particulate material before water reaches the downstream treatment cartridges.
Captures suspended dirt carried through the incoming supply.
Helps reduce particulate rust before it reaches downstream filtration stages.
Provides physical filtration of suspended sand, silt and similar material.
The listed configuration uses a nominal 5 micron sediment stage.
Reduces particulate loading on the scale-control, carbon and UV treatment stages.
The sediment cartridge is a consumable component and requires periodic inspection and replacement.
The original listed configuration uses a One Stop Plus cartridge as its scale-control stage.
This type of treatment is intended to condition hardness minerals so they are less likely to form hard scale deposits on compatible plumbing and equipment surfaces.
The scale-control stage itself does not require salt regeneration, but this does not mean the complete filtration and UV system is maintenance-free.
The third listed cartridge stage uses activated-carbon block media.
Carbon treatment is intended to reduce chlorine and unwanted taste and odour in applicable water supplies while also providing additional physical filtration according to the cartridge specification.
Activated carbon can provide chlorine reduction where chlorine is present in the incoming supply.
Carbon treatment is commonly used to reduce unwanted taste associated with the incoming water.
The carbon stage can also reduce unwanted odour within the limits of the supplied cartridge.
The UV system is installed downstream of the three filtration stages so the incoming water has already passed through sediment, scale-control and carbon treatment before entering the UV chamber.
UV performance depends on several factors including water clarity, UV dose, flow rate, lamp condition, quartz-sleeve cleanliness and the exact UV unit supplied.
The scale-control cartridge itself does not require electrical power, but the UV treatment stage does.
The system therefore needs a suitable electrical supply positioned for the UV equipment and installed in accordance with the UV unit's requirements.
The Triple 20 configuration uses large-format 20-inch Big Blue-style housings rather than small under-sink cartridges.
This format is intended for higher-volume point-of-entry applications where water is treated before being distributed through applicable household plumbing.
Exact cartridge diameter, connection sizes, housing pressure limits and mounting requirements should be confirmed against the hardware supplied with the selected system.
The sediment, carbon and scale-control stages can address common whole-house treatment requirements where the supplied media is suitable for the local water chemistry.
Rainwater applications can require sediment filtration and UV treatment, but cartridge selection and source-water condition must be considered before installation.
Bore water may contain dissolved iron, manganese, salinity, hardness or other issues that require testing and specialist treatment beyond this standard configuration.
| Specification | System Detail |
|---|---|
| Brand | WFW |
| Application | Whole-house / point-of-entry filtration |
| Housing Configuration | Triple 20-inch Big Blue |
| Stage 1 | 5 micron sediment filtration |
| Stage 2 | One Stop Plus scale-control cartridge in the listed original configuration |
| Stage 3 | Carbon block filtration |
| UV Treatment | Included; exact UV model and rating to be confirmed with supplied configuration |
| System Flow | Confirm against supplied cartridges and UV specification |
| Operating Pressure | Confirm against supplied housings and UV equipment |
| Connection Size | Confirm against selected system hardware |
| Electrical Supply | Required for UV operation |
A scale-control cartridge is intended to reduce the tendency of hardness minerals to form hard deposits on surfaces.
It does not automatically lower the measured hardness of the water in the way a salt-regenerated ion-exchange softener does.
The exact limits for hardness, pH, iron, manganese, chlorine, flow and cartridge life should be confirmed against the current scale-control cartridge supplied with the system.
The system's usable flow cannot be determined simply from the size of the filter housings.
The practical flow rate is influenced by the sediment cartridge, scale-control cartridge, carbon block, UV chamber, plumbing size, incoming pressure and required UV dose.
The Triple 20 + UV system is not maintenance-free. Each treatment stage has its own service requirements.
Replace according to sediment loading, water use and the specification of the cartridge supplied.
Replace at the service interval specified for the exact antiscale cartridge fitted to the system.
Carbon service life depends on incoming chlorine level, water use and the capacity of the supplied cartridge.
Replace at the interval specified by the manufacturer of the UV unit rather than waiting for the lamp to stop illuminating.
Inspect and clean as specified so deposits do not interfere with UV transmission.
Inspect sealing surfaces whenever the filter housings are opened for maintenance.
Servicing the ultraviolet stage involves both pressurised plumbing and electrical equipment.
The UV lamp and quartz sleeve are glass components and should be handled carefully. Avoid direct exposure to an operating UV lamp outside its protective chamber.
The listed system configuration includes the triple 20-inch filtration assembly, scale-control stage, carbon treatment and UV system.
Before ordering, confirm the exact supplied package for:
Order the WFW Triple 20" Big Blue with AntiScale + UV for delivery to supported Australian locations where you already have a suitable installer.
Check the supplied scale-control cartridge, carbon stage, UV specification and connection requirements before installation.
Professional installation may be available in eligible Brisbane and Gold Coast service areas, subject to site access and installation requirements.
It refers to three large-format 20-inch filtration housings used as separate treatment stages.
Yes. It is designed for point-of-entry installation before water is distributed through applicable household plumbing.
The listed configuration uses a 5 micron sediment cartridge.
The original listed configuration uses a One Stop Plus scale-control cartridge. Confirm the current replacement cartridge when servicing an existing system.
The listed system uses a carbon block cartridge for chlorine, unwanted taste and odour treatment.
No. Scale-control media is intended to manage scale formation rather than remove calcium and magnesium through conventional ion exchange.
The original scale-control technology is designed without conventional salt regeneration. Follow the specification of the current cartridge supplied.
Yes. The UV stage requires electrical power even though the cartridge filtration and scale-control stages themselves do not.
Yes. UV treatment is included downstream of the cartridge stages.
The correct microorganism-reduction claim depends on the exact UV model, validated UV dose, water clarity and flow rate. Confirm the supplied UV specification.
The listed carbon block stage is intended to provide chlorine treatment within the capacity and operating conditions of the supplied cartridge.
There is no single interval for every stage. Follow the service specification for the sediment, carbon and scale-control cartridges supplied with the system.
Follow the replacement interval specified by the manufacturer of the exact UV unit supplied.
No. Filter cartridges, scale-control media, UV lamps, quartz sleeves and housing seals all require periodic inspection or replacement.
A suitably configured filtration and UV system can be used for rainwater, but the water source and treatment requirements should be assessed before installation.
Professional installation may be available in eligible Brisbane and Gold Coast service areas where the site, plumbing and electrical requirements are suitable.
Purchase the system without adding installation where you already have your own suitable installer.
The system is presented as separate sediment, scale-control, carbon and UV treatment stages rather than making one broad purification claim.
Installed Today can also support eligible local installations where plumbing access, system sizing and electrical provision are suitable.
The WFW Triple 20" Big Blue with AntiScale + UV Whole Home Water Filter System combines three large 20-inch filtration stages with scale-control and downstream ultraviolet treatment.
The listed configuration uses 5 micron sediment filtration, a One Stop Plus scale-control stage and carbon block filtration. The scale-control stage should not be confused with conventional water softening, and the UV system requires electrical power and its own ongoing maintenance.
Before ordering, confirm the current cartridge models, exact UV specification, system flow, connection requirements and suitability for your water source. This is particularly important when replacing an older One Stop Plus cartridge, because current replacement media and the recommended cartridge sequence may differ from the original installation.
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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.
Most hot water orders in metro areas are delivered quickly, with around 90% arriving within 1 business day.
Hot water systems cannot always be transported safely by courier during rain. Delivery timeframes may be affected when wet weather impacts safe handling, loading, unloading or transport conditions.
If your express delivery order takes longer than 1–4 business days, we will adjust the delivery timeframe to our standard 2–8 business days and refund your express shipping charge automatically.
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