Water Filter Replacement Cartridges Australia
Choose How You Want to Order
Not every water filter setup is the same. Choose supply only if you already have an installer arranged, select supply and installation together where available, or compare your options if you are still deciding what best suits your home.
Supply Only
Best if you already have a licensed plumber or installer arranged.
You receive the water filter system and the components listed with that product. Installation and site-specific plumbing work are not included unless shown or selected separately.
Additional cartridges, fittings, valves, pipework changes, pressure limiting valves, electrical work, drainage, compliance upgrades or removal of existing equipment may be required depending on your installation.
Supplied & Installed
Best if you want the water filter system and installation organised together.
Select your preferred water filtration system, complete the installation questions on the product page and choose any applicable installation options before checkout.
Installation availability and final requirements depend on your location, access, existing plumbing, selected filter system and site conditions.
Not Sure What You Need?
Water filter systems vary by filtration type, flow rate, cartridge setup, property size and water quality concerns.
Compare under-sink, whole-house and drinking-water filtration systems using the ranges and selection tools throughout the site.
Consider your water source, treatment goals, required flow, cartridge setup, property size and installation location before choosing.
Water Filter Cartridges & Service Kits for Whole Home, Drinking Water, RO & UV Systems
Water filter cartridges and service kits are the replaceable components used to maintain whole-home filters, under-sink drinking-water systems, reverse osmosis systems and other water-filtration equipment.
This collection includes sediment cartridges, carbon cartridges, system-specific replacement cartridges, reverse osmosis service parts and complete multi-stage service kits.
Installed Today supplies replacement cartridges across supported mainland Australian markets, with service or supplied-and-installed options available on selected products in eligible Brisbane and Gold Coast service areas.
Water Filter Replacement Parts Available
How to Choose the Correct Replacement Water Filter Cartridge
The most important step is identifying the filtration system already installed.
Start with the brand and model number on the filter system, cartridge, housing or service label.
Then confirm:
- Filter system model
- Cartridge part number
- Cartridge length
- Cartridge diameter
- Micron rating
- Filter-media type
- Number of filtration stages
- Housing type
- Required flow rate
- Water source and application
Sediment, Carbon and Specialty Water Filter Cartridges
Sediment Cartridges
Designed to capture particles such as dirt, rust, sand and other suspended material according to the cartridge's design and micron rating.
Carbon Cartridges
Commonly used for chlorine taste and odour reduction and other product-specific treatment depending on the cartridge media and certification.
Specialty Media
Selected cartridges and replacement media are designed for additional treatment goals. Check the exact product specification rather than assuming every cartridge targets the same substances.
What Does a Water Filter Micron Rating Mean?
A micron rating describes the approximate particle size a filter is designed to capture under its specified conditions.
A smaller micron number generally indicates finer particle filtration, but a finer cartridge can also create greater resistance or block more quickly where the incoming water carries heavy sediment.
Micron rating alone does not tell you whether a cartridge reduces chlorine, PFAS, lead, microorganisms or another specific contaminant. Those claims need to be checked against the individual cartridge.
10″ vs 20″ Whole Home Water Filter Cartridges
| Cartridge Class | Common Application | Main Advantage | What to Confirm |
|---|---|---|---|
| 10″ | Compact whole-home and selected smaller systems | Smaller housing footprint | Length, diameter and exact housing compatibility |
| 20″ | Higher-flow whole-home systems | Greater media area and capacity depending on cartridge | Length, diameter, housing and system flow requirements |
| Large Diameter | Jumbo / large-format housings | Designed for higher-capacity filtration applications | Do not match on length alone |
A 20″ Cartridge Is Not Automatically the Right 20″ Cartridge
Cartridge length is only one measurement.
Whole-home filtration systems can use different cartridge diameters, housing styles and connection arrangements even when the nominal cartridge length is the same.
Check the existing system model and cartridge code before ordering rather than buying from the words “10 inch” or “20 inch” alone.
Why Choose a Complete Water Filter Service Kit?
Multi-stage water filters often use different cartridges in each housing.
A model-specific service kit groups compatible replacement parts together so scheduled maintenance is easier.
Current examples in the Installed Today range include service kits for Puretec whole-home, drinking-water and reverse-osmosis filtration systems.
Always check what is included because a service kit may not include every possible consumable, lamp, membrane, o-ring or replacement part used by the complete system.
Under-Sink Drinking Water Replacement Cartridges
Under-sink drinking-water systems can use single cartridges or several filtration stages depending on the system.
Current Installed Today examples include cartridges such as the Puretec CB951 and system-specific service kits for drinking-water filtration equipment.
Check the cartridge code rather than assuming a generic carbon cartridge will provide the same treatment performance as the original.
Whole Home Water Filter Cartridge Replacement
Whole-home systems generally operate at much higher flow rates than an under-sink drinking-water filter.
Cartridge selection therefore needs to account for both treatment and the amount of water flowing through the system.
Current Installed Today examples include Puretec EM2-60 and EM2-100 service kits for 10″ and 20″ whole-home filtration applications.
Reverse Osmosis Cartridges, Filters and Membranes
Reverse osmosis systems can use several consumable components, including sediment pre-filters, carbon cartridges, post-filters and an RO membrane.
These components do not necessarily share the same replacement interval.
A scheduled cartridge service therefore does not automatically mean the RO membrane also needs replacement.
Check the exact RO model, membrane type and manufacturer maintenance schedule before ordering.
Replacement Cartridges for UV Water Filtration Systems
UV water treatment commonly relies on pre-filtration to help provide suitable water conditions before water passes through the UV chamber.
Sediment and other cartridge stages therefore remain an important maintenance component in many UV filtration systems.
The UV lamp itself is a separate service component from the water filter cartridges and should be maintained according to the exact system's instructions.
Choosing Replacement Cartridges for Town Water
Town-water filtration often focuses on treatment goals such as sediment, taste, odour, chlorine or another product-specific contaminant concern.
Select cartridges based on the existing filtration system and verified cartridge performance rather than choosing purely from colour, price or micron rating.
Choosing Cartridges for Rainwater and Tank Water
Rainwater systems can encounter different filtration loads from town water because sediment, roof debris and other suspended material may enter the tank.
Cartridge selection should consider water clarity, sediment loading, pump flow, filtration stages and any downstream UV treatment.
Where water quality is uncertain, filtration selection should be based on the water source and required treatment rather than assuming one standard cartridge combination suits every rainwater system.
Dirty Cartridges Can Restrict Water Flow
As sediment and other material accumulate within a cartridge, pressure drop across the filtration system can increase.
Symptoms can include lower flow at taps and showers or a noticeable pressure difference compared with when the cartridges were new.
If flow remains poor after correct cartridge replacement, the housing, valves, pressure control or other plumbing restrictions may also need investigation.
How Often Should Water Filter Cartridges Be Changed?
There is no single replacement interval that applies to every water filter cartridge.
Service frequency depends on the cartridge, manufacturer instructions, water quality, household consumption, sediment loading and filtration system.
Replace cartridges according to the applicable product schedule and investigate earlier servicing if there is an unusual reduction in flow, return of taste or odour, visible cartridge loading or another change in system performance.
Water Filter Maintenance Should Be Planned
A cartridge is a consumable part of the filtration system.
Scheduled servicing helps avoid leaving a cartridge in service long after its intended maintenance period.
Keeping a record of the filter model, cartridge codes and service date makes future replacements significantly easier.
Flush Replacement Cartridges as Required
Many new cartridges require flushing after installation before the filtered water is used normally.
Flushing can help remove trapped air, loose carbon fines or other material associated with a newly installed cartridge.
Follow the instructions for the exact replacement cartridge because the required flushing procedure and volume can vary.
Cartridge Replacement Is Also a Good Time to Inspect the Housing
When a filter housing is opened, the housing bowl, seal and o-ring should be checked before the system is returned to service.
Old seals, damaged housings or incorrect reassembly can contribute to leaks.
Replacement cartridges do not automatically include new housings, valves, o-rings or other plumbing parts unless those items are specifically shown in the selected product or service kit.
Why Cartridge Compatibility Matters
Wrong Physical Size
The cartridge may not seal or fit correctly within the existing housing.
Wrong Filtration Type
The replacement may not provide the treatment function the original system was designed around.
Wrong Flow Characteristics
An unsuitable cartridge can create unwanted pressure drop or fail to match the system's intended operating flow.
Do Not Assume Every Cartridge Removes the Same Contaminants
Sediment rating and carbon construction do not automatically prove reduction of every contaminant.
Where PFAS, lead, chloramine, pesticides, heavy metals or another specific substance matters, check the exact cartridge's tested or certified performance.
A brand name or number of filtration stages should not be used as a substitute for verified product-specific treatment data.
Supply Only vs Water Filter Service
Supply Only
Best if you know the exact replacement cartridge or service kit and are arranging the maintenance yourself or through your own suitable installer.
Brisbane Service
Selected cartridge replacement and water-filter service options may be available in eligible Brisbane metro service areas.
Gold Coast Service
Selected filter servicing and cartridge replacement options may also be available in eligible Gold Coast service areas.
Water Filter Cartridges & Service Kits Brisbane
Brisbane is a primary water-filter service market for Installed Today. Selected cartridges and service kits can be supplied with servicing in eligible Brisbane, Logan, Ipswich, Moreton Bay and Redlands service areas.
Common service work includes whole-home cartridge replacement, under-sink filter maintenance, multi-stage service kits and selected RO filter maintenance.
Availability depends on filter type, system condition, cartridge compatibility, housing access, isolation valves, pressure and any additional plumbing work required.
Water Filter Cartridges & Service Kits Gold Coast
Selected water filter cartridge replacement and servicing options are also available across eligible Gold Coast service areas.
Before booking servicing, identify the existing filter system and cartridge model where possible so the correct replacement parts can be prepared.
Buy Water Filter Cartridges Across Major Australian Metro Areas
Supply-only cartridges and service kits are available across supported mainland Australian markets where delivery is available.
Our main filtration supply markets include Brisbane, Gold Coast, Sunshine Coast, Sydney, Melbourne, Perth and Adelaide, together with Townsville, Cairns, Toowoomba, Newcastle, Central Coast, Wollongong and Geelong.
Brisbane and Gold Coast remain the primary Installed Today servicing markets. Customers elsewhere can order supply only and arrange their own suitable servicing where required.
Match the Cartridge First, Then Compare Price
The correct replacement cartridge is the one that matches the filtration system's physical housing, treatment purpose and operating requirements.
Check model number, size, diameter, micron rating, filtration media, service schedule and system compatibility before ordering.
Where an exact model-specific service kit exists, it can simplify maintenance and reduce the risk of mixing incompatible cartridge stages.
Water Filter Cartridges and Service Kit FAQs
Common questions about choosing, ordering and replacing water filter cartridges and service kits for under sink drinking water systems, whole home water filters, 10 inch cartridges, 20 inch cartridges, sediment filters, carbon filters and scheduled water filter maintenance.
What are water filter cartridges?
Water filter cartridges are the replaceable filter components inside a water filtration system. They are designed to help reduce specific water quality issues such as sediment, dirt, rust, chlorine taste, odour and other contaminants depending on the cartridge type, micron rating and system selected.
What is a water filter service kit?
A water filter service kit usually includes the replacement cartridges required for a specific filtration system. Some service kits may also include other maintenance parts depending on the model. They make it easier to order the correct replacement set instead of matching each cartridge individually.
How do I know which replacement cartridge I need?
The right replacement cartridge depends on your existing filter system, housing size, cartridge code, water source and filtration goal. Check the model number on your current cartridge, the system label or the original product information before ordering. If you are unsure, match the cartridge by brand, size and part number where possible.
What is the difference between 10 inch and 20 inch cartridges?
A 10 inch cartridge is smaller and commonly used in compact whole home or point-of-use systems. A 20 inch cartridge has more surface area and is often used in larger whole home systems where higher flow or longer cartridge life may be required. Always match the cartridge size to your existing housing.
Can I use any cartridge in my water filter housing?
No. Cartridges need to match the housing size, system type, flow rate, water source and filtration purpose. Using the wrong cartridge can reduce performance, affect water pressure, cause poor sealing or fail to treat the water as intended.
How often should water filter cartridges be replaced?
Cartridge replacement timing depends on the cartridge type, water quality, household usage, flow rate and manufacturer recommendations. Many cartridges are replaced every 6 to 12 months, but homes with heavy sediment, tank water, high usage or noticeable taste and odour issues may need more frequent changes.
What happens if I do not replace my cartridges on time?
Old or blocked cartridges can reduce flow, affect water pressure and lower filtration performance. In some systems, delayed servicing may also place extra strain on the filter housing, seals or downstream components. Replace cartridges when due or when water flow, taste, odour or clarity starts to change.
Will replacing cartridges improve water pressure?
If your current cartridges are blocked with sediment or past their service life, replacing them may help restore better flow through the filtration system. If pressure issues continue after replacement, the cause may be related to system sizing, pipework, valves, water pressure or another plumbing issue.
What is a sediment filter cartridge?
A sediment filter cartridge is designed to help reduce dirt, rust, sand, silt and other visible particles in the water. Sediment cartridges are commonly used as the first stage in under sink, whole home, rainwater and UV filtration systems.
What is a carbon filter cartridge?
A carbon filter cartridge is commonly used to help reduce chlorine taste, odour and selected chemicals depending on the cartridge specification. Carbon cartridges are often used in drinking water filters and whole home filtration systems where taste and odour improvement is important.
What does cartridge micron rating mean?
Micron rating refers to the approximate particle size the cartridge is designed to filter. A lower micron rating can filter finer particles, but it may also reduce flow faster if the water has heavy sediment. The right micron rating depends on your system, water quality and filtration goal.
Are under sink cartridges different from whole home cartridges?
Yes. Under sink cartridges are usually designed for drinking water at a single outlet, while whole home cartridges are designed to filter water for multiple outlets across the property. Whole home cartridges generally need to support higher flow rates and larger water volumes.
Do whole home cartridge service kits suit every system?
No. Service kits are system-specific. A 10 inch service kit should only be used with compatible 10 inch systems, and a 20 inch service kit should only be used with compatible 20 inch systems. Always check the product name, model number and cartridge codes before ordering.
Can I replace water filter cartridges myself?
Some cartridges are designed for straightforward replacement, but the process depends on the system, housing style, access, pressure and installation setup. Always isolate the water supply, release pressure where required and follow the manufacturer instructions. If the system is difficult to access or leaking, professional servicing is recommended.
Should I flush new cartridges after installation?
Yes. Most new cartridges should be flushed after installation to clear loose carbon fines, trapped air or manufacturing residue. Flushing requirements vary by cartridge and system type, so follow the product instructions before using the filtered water.
Can old cartridges cause bad taste or odour?
Yes. If a cartridge is overdue for replacement or has reached capacity, taste and odour can return or become more noticeable. Replacing the cartridge and flushing the system can help restore normal filtration performance where the cartridge is the cause.
Can I buy water filter cartridges supply only?
Yes. Supply-only cartridge and service kit options are suitable if you know the correct replacement part and plan to install it yourself or have a plumber arranged. Supply-only pricing does not include installation, servicing, leak repairs, housing replacement, valve upgrades or plumbing alterations.
Can I order cartridge replacement with installation or servicing?
Servicing options may be available for selected water filter cartridges and service kits in eligible Brisbane and Gold Coast service areas. Availability depends on the product, location, access, existing system condition, cartridge type and whether extra parts or repairs are required.
Do cartridge replacements include new housings or valves?
Replacement cartridges and service kits generally include the filter cartridges only unless the product listing states otherwise. New housings, valves, pressure limiting valves, bypass valves, fittings, pipework changes, leak repairs and system upgrades are not included unless selected separately.
Do you supply water filter cartridges and service kits in Brisbane and the Gold Coast?
Supply-only options are available for selected water filter cartridges and service kits. Servicing or replacement options may be available in eligible Brisbane and Gold Coast areas depending on the cartridge, system type, access, existing installation and service requirements.