Replacement Cartridges
Maintain peak performance with genuine Armour replacement cartridges. Designed for reliable contaminant reduction and consistent flow, they keep your system delivering clean, great tasting water every day.
Water Filter Cartridges: Keep Your Filtration System Performing at Its Best
Your water filter is only as good as the cartridge inside it. No matter how advanced your system is, worn or overdue filter cartridges will reduce filtration performance, restrict flow, and allow contaminants to pass through that a fresh cartridge would have caught. At Armour Water, we stock a comprehensive range of replacement water filter cartridges to suit all major systems, so keeping your water filtration setup running at full capacity has never been easier.
We know that staying on top of maintenance is not always front of mind, especially when life gets busy. That is why we make the process as straightforward as possible. Our replacement cartridges are easy to install, clearly labelled, and matched to the systems we supply. Whether you are maintaining an under-sink reverse osmosis unit, a whole house system, or a countertop filter, we have the right cartridge for the job, delivered to your door when you need it.
The reward for staying on schedule is simple: consistently great tasting, high quality drinking water every single day. That is a result worth protecting, and our team is here to help you do exactly that.
Why Regular Cartridge Replacement Is Essential for Clean Filtered Water
Every water filtration cartridge has a finite capacity. Over time, the filtration media inside the cartridge become saturated with the contaminants it has absorbed or physically blocked by the particles it has captured. Once that happens, the cartridge can no longer do its job properly. In some cases, a fully saturated carbon cartridge can even begin to release previously absorbed contaminants back into your filtered water, which is the opposite of what you want.
Regular replacement of your filter cartridges is the single most important maintenance task for any home water filtration system. It is what keeps your filter systems operating as designed, ensures your flow rate stays consistent, and protects the more expensive components in multi-stage setups, such as the RO membrane, from taking on loads they are not meant to handle.
At Armour Water, we always recommend following the replacement schedule that comes with your system. If you are unsure of your schedule or have misplaced your documentation, please do not hesitate to contact us. Please contact our team, and we will look up your installation records and provide you with the right guidance. Keeping your filtration systems healthy is something we genuinely care about, and we are always happy to help.
Our Range of Replacement Water Filter Cartridges
Sediment Filtration Water Filter Cartridges
Sediment filter cartridges are the first stage in most water filtration systems, removing sand, rust, silt, and suspended particles before water reaches other filters. These replacement water filter cartridges help protect downstream filtration components and maintain strong water flow. Available in multiple micron ratings, they suit different water conditions and are easy to install in standard housing systems.
Carbon Block and Activated Carbon Cartridges
Carbon block and activated carbon filter cartridges remove chlorine, chloramines, VOCs, and chemicals that affect taste and odour in drinking water. These water filtration cartridges use high-quality activated carbon media to absorb contaminants and improve water quality. Carbon block cartridges provide greater contact surface, making them ideal for under sink water filtration systems where cleaner drinking water is essential.
RO Membrane Replacement Cartridges
The RO membrane replacement cartridge is the core component of a reverse osmosis water filtration system. It removes dissolved contaminants including heavy metals, fluoride, nitrates, and PFAS chemicals at a molecular level. While RO membranes last longer than other filter cartridges, they eventually require replacement to maintain filtration performance and ensure consistently high-quality drinking water.
Post-Carbon and Polishing Cartridges
Post-carbon and polishing filter cartridges are the final stage in many water filtration systems. They remove any remaining taste or odour from water stored in the system’s holding tank, ensuring fresh, clean drinking water at the tap. These replacement water filter cartridges help maintain optimal performance and are typically replaced annually as part of regular filter maintenance.
Whole House Filter Cartridges
Whole house filter cartridges treat water at the point it enters your property, filtering the full flow of water used throughout your home. These replacement cartridges for whole house filtration systems remove sediment, chlorine, and other contaminants before water reaches taps and appliances. Available in standard 10-inch and 20-inch housings, they provide reliable filtration and easy replacement.
How to Know When Your Filter Cartridges Need Replacing
A properly maintained water filtration system depends on replacing filter cartridges at the right time. Every system we install comes with a recommended replacement schedule based on the cartridge type and your household’s daily water usage. Following this schedule ensures your filtered water quality, water pressure, and filtration performance remain consistent.
Over time, replacement water filter cartridges gradually fill with contaminants they remove from your water supply. When cartridges reach their capacity, filtration efficiency can decline. Staying on schedule helps maintain strong water flow and ensures your water filtration system continues delivering clean, safe drinking water.
Regular cartridge replacement also helps extend the life of other components within your filtration system. By keeping your water filter cartridges fresh and operating efficiently, you protect your system while maintaining reliable filtration performance throughout your home.
Drop in Water Pressure or Flow
A noticeable reduction in water pressure from your filtered tap often means a sediment filter cartridge is becoming clogged with particles.
Chlorine Taste or Unpleasant Odour
If chlorine taste or chemical odours return, the carbon filter cartridge may be exhausted and require replacement.
Cloudy or Discoloured Water
Cloudy or unusual coloured water can indicate a water filter cartridge has reached capacity and needs replacing.
Unsure When Filters Were Changed
If you cannot remember your last service, it may be time to replace your replacement water filter cartridges to maintain proper filtration.
Genuine Replacement Cartridges for All Major Filter Systems
At Armour Water, we stock genuine and compatible filter cartridges for all the systems we supply, as well as a broad range of popular third-party filter systems brands used across Australia. Whether your system is an under-sink RO unit, a whole house setup, or a countertop filter, we carry the cartridges you need.
We are committed to stocking only high quality cartridges from trusted manufacturers. Our replacement cartridges are independently tested to confirm they meet the performance claims on the label. We do not cut corners on product quality because we know that the entire value of your filtration systems investment depends on having reliable, effective cartridges doing their job every day.
We also offer a convenient subscription and reminder service for our customers. Register your system with us and we will send you a reminder when your next filter cartridges change is due, with the option to have your cartridges delivered automatically so you are never caught without a fresh supply. It is the simplest way to stay on top of maintenance and keep your great tasting, quality water flowing without interruption.
Professional service, clear advice, and a filtration system that delivers consistent results. A smart upgrade for any household concerned about water quality.
Frequently Asked Questions About Water Filter Cartridges
The replacement frequency for filter cartridges depends on the type of cartridge, the system it is used in, and your household's daily water consumption. As a general guide, sediment cartridges in a whole house or under-sink system typically need changing every six months. GAC every 6 months, carbon block and post-filter every 12 months. RO membranes generally last two to five years, while post-carbon polishing cartridges are typically changed annually.
If your home is on a bore, tank, or heavily sediment-laden water supply, your pre-filter cartridges may need to be replaced more frequently than the standard schedule suggests. Usage volume also plays a role: a household of five or six people will exhaust the cartridge's capacity faster than a single-person household using the same water filtration system. The best approach is to follow the schedule provided with your system and monitor for the early signs of cartridge exhaustion, such as reduced flow, changes in taste, or odour returning to your filtered water. If you are ever unsure, please contact our team for personalised advice tailored to your specific setup and water source.
Yes, many of our replacement water filter cartridges are compatible with the standard housing sizes and thread configurations used by the most popular residential filter brands in Australia. Our whole-home system uses 20" x 4.5" Big Blue-format cartridges. Standard 10" cartridges are not compatible with this system. Standard O-ring and thread fittings are compatible with a wide range of housings from different manufacturers, making it straightforward to source replacement cartridges without being locked into a single supplier.
That said, some proprietary systems use non-standard cartridge formats that require brand-specific replacements. If you are unsure whether a particular cartridge will fit your housing, the safest approach is to bring in your existing cartridge or check the model number on your system, and please contact our team before ordering. We would rather take five minutes to confirm compatibility than have you receive a cartridge that does not fit. We stock a wide range of filter cartridges and can almost always find a compatible option. Our goal is to make it as simple and affordable as possible to maintain your filtration systems, regardless of the brand you originally purchased.
Skipping or delaying filter cartridges replacements has a direct and measurable impact on the performance of your water filtration system. The most immediate effect is usually a drop in water pressure and flow rate as blocked sediment cartridges restrict the passage of water through the system. If the carbon stage is overdue, you may notice that your drinking water starts to taste and smell like chlorine again, because the exhausted carbon media can no longer absorb it effectively.
More concerning is what can happen in systems where a saturated carbon block cartridge is left in place too long. Fully exhausted carbon media can begin to release previously absorbed contaminants back into the water passing through it, a process known as carbon breakthrough. This means your filtered water could, in some cases, contain higher contaminant levels than unfiltered tap water. Overdue pre-filter cartridges also force downstream components, including expensive RO membranes, to operate beyond their design limits, significantly shortening their lifespans. Regular, timely filter cartridge replacement is the single most cost-effective thing you can do to protect your entire filtration system's investment.
The easiest way to identify the correct replacement water filter cartridges for your system is to check the model number on your existing cartridge housing or refer to the documentation that came with your system at installation. Most housings have the recommended cartridge size and media type printed directly on the housing label or in the owner's manual.
If your system was installed by Armour Water, we keep records of every installation we have completed, including the system model, cartridge specifications, and recommended service schedule. All you need to do is please contact our team with your name and address, and we can pull up your installation details and confirm exactly which filter cartridges you need. We can also advise if an upgrade to a higher performance cartridge would benefit your specific water filtration setup, for example moving from a standard sediment cartridge to a dual-gradient cartridge for better particle capture and longer service life. Our team genuinely enjoys helping customers get the most out of their filter systems and is always happy to talk through the options.
In most cases, changing replacement water filter cartridges in a standard under-sink or whole house system is a straightforward task that a confident homeowner can handle without any specialist skills. Most modern filter systems use twist lock or snap-in cartridge housings that are designed to be easy to install and change out at home. The process typically involves shutting off the water supply to the system, unscrewing the filter housing, removing the old cartridge, inserting the new one, and refitting the housing. A basic filter housing wrench, usually included with the system, is the only tool needed.
We include clear, illustrated change-out instructions with all our filter cartridges so you always have step-by-step guidance on hand. For customers who prefer not to do it themselves, or for systems with more complex configurations such as multi-stage RO units with multiple housings, we offer a professional cartridge replacement service. Our technicians can visit your home, replace all cartridges, flush the system, and confirm that everything is functioning correctly in a single visit. This is the easy to install experience taken one step further: zero effort on your part and complete confidence that your high quality drinking water is back to its best. Either way, we are here to support you in keeping your water filtration system in top condition.