Water filter cartridges do the heavy lifting in any filtration system, so keeping them fresh matters. Over time, they fill up with the stuff you’re trying to keep out—like chlorine, rust, or sediment—which can slow things down or affect water quality. Swapping out your cartridges regularly helps the system do its job properly and keeps your water tasting how it should.
There’s a wide range of replacement cartridges here to suit different filter setups used in New Zealand homes—from under-sink units to whole-house systems. Whether you’re after a carbon block, sediment filter, or something more specialised, each option is made to slot in easily and get your system back to full strength.
Hydronix
Carbon Block Cartridge (CB Series) for Chlorine and/or Bad Tastes & Odours
Sale priceFrom $22.00
Save $3.00
WaterFilters Online NZ
Replacement Inline GAC Filter Cartridge with Integrated 1/4" Quick Connect Fittings
Sale priceFrom $42.00
Regular price$45.00
Water Filters Online NZ
2 Stage whole House Filter Set compatible with Puretec WH2-55 & WH2-60
Sale priceFrom $170.00
WaterFilters Online NZ
HRV Compatible Filtration Filters: Quality at less cost
Sale priceFrom $125.00
WaterFilters Online NZ
Fluoride Reduction Cartridge (Inline, Standard & Jumbo)
Sale priceFrom $55.00
Save $102.20
Hydronix
Hydronix Inline GAC with Scale Inhibitor with Integrated 1/4" Quick Connect Fittings
Sale priceFrom $65.00
Regular price$167.20
Doulton Fairy Ceramics
10" Ceramic Water Filters for Bacteria Removal
Sale priceFrom $60.00
In stock
Save $278.50
Hydronix
1 Micron Absolute Micron Depth Filter Cartridges
Sale priceFrom $34.50
Regular price$313.00
Hydronix
Alkaliser ORP Cartridge for pH Increase and Remineralise Water - Multiple Sizes
Sale priceFrom $75.00
