You turn on the tap to wash your vegetables, fill the bath for your kids, or run the dishwasher. Somewhere in the back of your mind, you wonder what's actually in that water. A whole house water filter takes that worry away.
What Is a Whole House Water Filter?
A whole house water filter, also called a point of entry water filtration system, connects to your main water supply line. Every drop of water that enters your home passes through it before reaching any fixture.
That means filtered water at the kitchen tap, the bathroom, the laundry, and the garden hose. All of it.
It's a different approach to filtering compared to single-tap or under sink filters. Instead of treating water at one point of use, a whole home water purifier treats everything at the source.
Benefits of a Whole House Water Filtration System
Cleaner Water Everywhere, Not Just the Kitchen
A lot of people think water quality only matters for drinking, but that’s not really the case. The water you shower in matters too, because your skin and hair are exposed to it every day.
Chlorine and other chemicals in untreated water can sometimes dry out skin and hair. For people with sensitive skin, eczema, or certain allergies, it can even cause irritation. A whole house water filtration system helps reduce these substances before the water reaches your shower, so the water used throughout the home is gentler on your skin.
Protection for Your Appliances
Sediment, scale, and minerals in water build up inside your appliances over time. This affects your hot water cylinder, dishwasher, washing machine, and even your kettle.
A residential water treatment system at the point of entry reduces that buildup, helping your appliances run more efficiently and last longer.
Better Tasting Drinking Water Throughout the Home
When you filter water for the whole home, drinking water from any tap tastes better. You're not limited to one filtered tap in the kitchen.
Less Maintenance Than You Think
A whole house water filtration system isn't high-maintenance. The main filter cartridges need replacing every six to twelve months depending on the model and your local water. Beyond that, it operates without much attention.
What Does a Whole House Water Filter Cost?
The cost of whole house water filters is not fixed and depends on the size of your home, your water quality needs, and the type of system you choose.
Multi-stage systems: These setups use more than one filter to clean the water as it passes through. Different stages deal with different issues, so they can help reduce things like sand, rust, chlorine, bacteria, and other unwanted particles. They usually cost a bit more to buy, but they cover more potential water quality problems.
Installation: Because a whole house system connects to the main water line, most people have a plumber install it. The system is typically placed where water enters the home so everything that flows through the pipes gets filtered.
Ongoing costs: The main thing you’ll need to budget for is replacing the filter cartridges from time to time. How often depends on your water use and the condition of the water. For many households, the yearly cost isn’t very high compared with constantly buying bottled water or dealing with appliances that get damaged by sediment or scale.
The best option really depends on your situation, where your water comes from, how many people are in the house, and what’s actually in the water. A simple water test beforehand can help you choose a system that makes sense for your home.
Is a Whole House Water Filter Right for You?
A whole house water filter makes the most sense if:
- You're on tank water or a private bore
- Your local council water has high chlorine levels
- You have family members with sensitive skin or allergies
- You want consistent water quality across the whole home
- You're building or renovating and can plan for installation
If you're mainly concerned about drinking water at one tap, a simpler inline or under sink filter might be enough. But if water quality affects your whole household experience, a point of entry water filtration system is worth considering seriously.
Common Contaminants a Whole House Filter Addresses
Different filters target different things. Common options include:
- Sediment filters: Remove dirt, rust, and particles
- Activated carbon filters: Reduce chlorine, taste, odour, and some chemicals
- UV filters: Kill bacteria and viruses without chemicals
- Iron or manganese filters: For bore water with high mineral content
Many whole house systems combine two or more of these stages for home water filtration system coverage that suits New Zealand's varied water sources.
How UV Water Systems Can Help
UV Water Systems specialises in residential water treatment for New Zealand homes. We test your water quality, recommend the right whole house water filter for your situation, and handle installation through experienced professionals.
Whether you're on town supply or tank water, we offer systems built to handle the real challenges New Zealand households face.
FAQs
How long does a whole house water filter system last?
The housing and main components of a quality whole house system can last ten to fifteen years or more with basic upkeep. What needs regular replacement are the filter cartridges inside, typically every six to twelve months. UV bulbs, if your system includes UV treatment, usually need replacing annually regardless of usage.
Does a whole house water filter reduce water pressure?
A properly sized system should have minimal impact on water pressure. If the filter becomes clogged or the system is undersized for your home, pressure can drop. This is why correct sizing during installation matters. Regular cartridge replacement also keeps flow rates consistent throughout your home.
Can I install a whole house water filter on tank water?
Yes, whole house water filters work very well for tank water. In fact, tank water users often benefit most since they don't have council treatment as a baseline. For homes that rely on tank water, people often install a multi-stage filtration system. This usually includes a sediment filter to remove dirt and particles, along with a UV unit that helps deal with bacteria or other microbes in the water.