From Karori, which by the 1960s was one of New Zealand's biggest suburbs, through Ngaio and Khandallah on the slopes of Mt Kaukau to Johnsonville's 1938 state houses, Churton Park's subdivisions from the 1970s and Tawa's post-war valley, these suburbs are mostly family homes on hillside sections, with infill added since the 1980s. Town water in Wellington, the Hutt Valley, Porirua and the Kāpiti Coast is treated and monitored, and Taumata Arowai regulates drinking water suppliers nationally. Plenty of households still choose to filter it, usually to change the taste or smell, catch sediment after nearby mains work, or simply give the family water they enjoy drinking. On tank and bore supplies, filtration is about safety as much as taste. We supply and install water filters for Wellington homes, from a single under-sink filter for the kitchen tap to a whole-house system on the main line, and we fit the replacement cartridges when they fall due.
Water filtration in the Western and Northern Suburbs: subfloor installs and long hillside supply pipes
From Karori to Tawa, homes are on the Tiaki Wai network, and the water arriving at the toby is treated and soft. What happens between the toby and the tap is where the western and northern hill suburbs differ from the flat parts of the city. On steep sections the supply pipe can run a long way up a bank to the house, and on older properties part of that run may be galvanised steel or early plastic. When an owner tells us the water tastes metallic or carries fine particles, we check that pipe before recommending a filter.
Most homes here have a suspended timber floor on a sloping site, which gives good subfloor space on the downhill side. That makes it the natural place for a whole-house filter: out of the weather, easy to reach for cartridge changes and close to where the supply enters. In Karori, Ngaio and Khandallah we often fit a sediment filter followed by a carbon stage there, so every tap in the house gets the same water. For homes that only want better drinking water, an under-bench unit at the kitchen sink does the job at lower cost.
Newer suburbs need a slightly different approach. Churton Park was built from the 1970s on cut and fill hill country and Johnsonville has seen housing spread up toward Mt Kaukau, so many homes have concrete slabs with no subfloor at all. In those houses we usually mount whole-house filters in the garage or a protected spot outside. Some owners in these suburbs also run a rainwater tank for the garden; tank water needs its own filtration and UV if it will ever be used indoors.
Local tip: If you have a high subfloor on the downhill side, mount a whole-house filter there with a clear path from the access hatch so cartridge changes stay easy.
For anything else, see our plumbers in the Western and Northern Suburbs.
Pricing: quotes are free, and every job gets a fixed price before we start, so there are no surprises on the invoice.
Water Filters Jobs We Do in the Western and Northern Suburbs
- Tank water filtration
- Under sink water filters
Water Filters Western and Northern Suburbs FAQs
Where does a whole-house filter go in a Churton Park home with a concrete slab?
Usually in the garage or a sheltered spot outside near where the supply enters. We protect it from the weather and leave room to change cartridges.
How often do filter cartridges need changing?
Typically every six to twelve months, depending on the cartridge and your water use. UV lamps are usually replaced yearly.
What does NSF certification mean?
The filter has been independently tested to reduce specific contaminants under an NSF/ANSI standard. Always check which contaminants are listed.