Products
Water Filter Cartridges
Sediment, carbon and specialist replacement cartridges in 10-inch, 20-inch and big blue sizes, matched to the housing you already have.
How we approach water filter cartridges
Replacement cartridges are where filtration performance is kept or lost. They come in common housing sizes, such as standard 10-inch and 20-inch and the larger big blue housings, and in sediment, carbon block, granular carbon and specialist types.
The right replacement depends on the housing size, the stage it sits in and the water it treats. If you are not sure what is fitted, a photo of the housing and the old cartridge is usually enough to match it.
What to check before buying
Matching a replacement cartridge comes down to three things.
Match the housing
Length and diameter must match the housing you already have.
Match the stage
Sediment, carbon and specialist cartridges each do a different job.
Keep a schedule
Regular changes keep pressure and taste where they should be.
FAQs
Questions before we quote
How do I know which cartridge to order?
Send a photo of the housing and the old cartridge, or the size printed on it. Length, diameter and stage type are what matter.
How often do cartridges need changing?
Sediment cartridges are changed when the pressure drops or they discolour, and carbon typically every six to twelve months. Borehole and tank water need more frequent changes.
Can I fit a finer cartridge for cleaner water?
Only if the stage before it protects it. A finer cartridge on a dirty supply clogs quickly and reduces pressure.
Related guides
Background reading before you choose a system.
How Water Filtration Systems Work: A Plain-English Guide
How water filtration systems work, stage by stage: what sediment, carbon, softeners, reverse osmosis and UV each remove, and why the order matters.
Read Guide
Water Filter Installation Cost in South Africa: 2026 Guide
What drives water filter installation cost in South Africa: water source, testing, flow and site access, plus 2026 equipment price ranges and running costs.
Read GuideOther filtration products
Water Filter Taps
Filtered drinking water at the kitchen sink, from a slim dedicated tap or a three-way mixer, fed by an under-sink or reverse osmosis system.
Learn MoreUnder-Sink Water Filters
Filtered drinking water from your own kitchen cabinet, with sediment and carbon stages feeding a dedicated tap or a three-way mixer.
Learn MoreUV Water Filters
Chemical-free UV disinfection for borehole, rainwater and tank water, fitted as the final stage after sediment filtration.
Learn MoreCarbon Water Filters
Activated carbon takes the chlorine taste and smell out of municipal water, and it is the stage behind most good-tasting drinking water at the tap.
Learn MoreSediment Water Filters
The first line of defence against sand, silt and rust, rated in microns so pumps, taps and finer filters downstream are not clogged.
Learn MoreWater Softeners
Ion-exchange softeners that stop scale on geysers, kettles and shower glass, sized once a hardness test shows the water needs it.
Learn More
Not sure which cartridge you need?
Send a photo of the housing and the old cartridge. We will match the replacement and suggest a sensible change schedule.