Sydney’s tap water is treated, tested, and monitored by Sydney Water before it leaves the plant. But between the treatment facility and your kitchen tap, that water travels through kilometres of infrastructure, picking up chlorine byproducts, trace sediment, and in some cases, dissolved metals from older pipes and fittings along the way.
This doesn’t mean the water is unsafe, but it can have a noticeable impact on your health, skin, and hair, especially for young children or those with more sensitive skin.
That’s why more Sydney homeowners are investing in water filter installation. Not out of necessity for safety, but because filtered water tastes noticeably better, reduces exposure to unwanted chemicals, and gives you more control over what your family uses every day.
So, what’s actually in your tap water, how can it impact your home and wellbeing, and which filtration system is right for your needs? In this guide, we cover everything you need to know about water filter installation, from the composition of Sydney’s tap water, the benefits of filtration, the main system options available, and what to expect from a professional installation.
Sydney’s Tap Water & What You’re Actually Drinking
Sydney’s drinking water is sourced from catchment dams, passes through major filtration plants, and is disinfected before entering the distribution network. From there, it’s carefully managed under strict safety guidelines to ensure it’s safe for everyday use by the time it reaches your tap.
Chlorine is the main disinfectant used in this process. It plays an important role in keeping the water free from harmful bacteria, but it can also affect the taste and smell. Depending on how close your home is to the treatment plant, the level of chlorine at your tap may vary; homes closer to the source often have slightly higher residual levels than those further along the network.
Water quality can also differ depending on the age of your property. Older homes with copper or brass plumbing are more likely to pick up trace metals as water sits in or flows through ageing pipes. Newer homes with modern fittings are less likely to experience this, although chlorine and small amounts of sediment are still common across most households.
More recently, attention has also turned to emerging contaminants such as PFAS (per- and polyfluoroalkyl substances). In 2025, the National Health and Medical Research Council updated the Australian Drinking Water Guidelines to include stricter limits for these compounds. Sydney Water continues to meet these standards, but it has contributed to a growing awareness among homeowners about what’s in their water…and how to take more control over it at the point of use.
How Water Quality Can Affect Daily Living
Most people think about water quality in terms of what they drink. But in reality, you’re using water throughout your entire day, whether that’s showering, bathing, washing your hands, or even cleaning your home.
Taste is one of the most common and noticeable factors. When tap water has a noticeable chlorine taste or smell, people tend to drink less of it, reaching for bottled water or other drinks instead. A filter that improves taste often improves hydration habits as a result. It’s a simple change, but a meaningful one!
Beyond an unpleasant taste, chlorinated water can contribute to dry skin and hair, particularly with prolonged or frequent exposure. For those with sensitive skin or conditions like eczema, unfiltered shower water can be an ongoing irritant.
The Impact on Your Home and Plumbing
Beyond personal health, unfiltered water affects your property over time, too.
- Mineral buildup and scale: Dissolved minerals in your water supply gradually form scale deposits inside pipes, taps, and fixtures. You might notice it as white or chalky buildup around showerheads, tap aerators, and inside kettles. Over time, this restricts water flow and reduces the lifespan of fittings.
- Appliance efficiency: Dishwashers, washing machines, and coffee machines all perform better with cleaner water. Scale buildup forces appliances to work harder, uses more energy, and shortens their operational life.
- Hot water system performance. Sediment and mineral deposits settle at the bottom of hot water systems, reducing heating efficiency and increasing running costs. In storage-based systems, this can also contribute to premature tank failure.
A whole home filtration system addresses all of these issues by filtering water before it enters your plumbing, protecting every pipe, fixture, and appliance in the process.
Water Filtration Options Explained
Not all water filters do the same thing. The right system depends on what you want to remove, how many outlets you want filtered, and your budget. Here’s an overview of the main options:
| Filter Type | What It Removes | Best For | Installation | Maintenance |
| Under-Sink | Chlorine, sediment, some heavy metals | Kitchen drinking water | Licensed plumber | Cartridge swap every 6–12 months |
| Shower Filter | Chlorine, some sediment | Skin and hair health | DIY or plumber | Cartridge swap every 6 months |
| Reverse Osmosis | Chlorine, fluoride, heavy metals, bacteria, dissolved solids | Purest drinking water | Licensed plumber | Multi-stage filter + membrane replacement |
| Whole Home | Chlorine, sediment, rust from every tap and outlet | Full property coverage | Licensed plumber | Filter change every 6–12 months |
| UV Sterilisation | Bacteria, viruses, parasites | Rainwater tank homes | Plumber + electrician | UV lamp replacement annually |
- Under-sink filters are one of the most popular choices, especially for kitchens. They connect directly to your cold water line and use activated carbon to reduce chlorine, improve taste, and remove sediment. Most systems also include a separate drinking tap, so you get filtered water on demand without altering your main kitchen tap.
- Shower filters attach to your existing showerhead or sit inline with your plumbing and are designed to reduce chlorine exposure while you shower. They’re often a good starting point if you’ve noticed dry skin or hair, and in many cases, they can be installed without needing a plumber.
- Reverse osmosis (RO) systems provide the highest level of purification. They work by pushing water through a semi-permeable membrane to remove a wider range of contaminants that standard carbon filters can’t capture. These systems typically include a dedicated tap and require a connection to a drain. UV systems, on the other hand, are most commonly used with rainwater tanks. They use ultraviolet light to neutralise bacteria, viruses, and parasites, helping ensure stored water is safe to use.
Why Whole Home Filtration Is Growing in Popularity
A whole-home water filtration system is installed at the point where water enters your property. This means every tap, shower, and appliance in your home receives filtered water from the start.
It’s a comprehensive, long-term solution that’s becoming increasingly popular with homeowners who prefer to address water quality across the entire property rather than in isolated areas.
- Filtered drinking water at every tap, not just the kitchen
- Reduced chlorine exposure when showering and bathing
- Less scale buildup in pipes, fixtures, and appliances
- Improved hot water system performance and longevity
- One system covering your entire property, rather than individual filters on separate outlets
However, it is important to consider that whole-home systems do carry a higher upfront cost than single-point filters. Installation is more involved, typically requiring work at the mains connection. And like all filtration systems, they require ongoing maintenance, with filter cartridges needing replacement every 6 to 12 months, depending on usage and water quality.
These are important considerations, but for most households, the long-term value outweighs the initial investment.
Who Is Whole Home Filtration Best For?
Whole home filtration suits a wide range of households, but it’s particularly well-suited to:
- Families: Filtered water at every outlet means children are drinking, bathing, and brushing teeth with cleaner water throughout the home. It removes the need to manage multiple individual filters.
- Renovations and new builds: If you’re already doing plumbing work, adding a whole home system during the build or renovation is the most convenient (and cost-effective) time to install one. The pipework is accessible and the system can be integrated from the start.
- Homeowners focused on long-term property performance: Reducing scale and sediment across your entire plumbing system protects fixtures, appliances, and hot water systems over time. It’s an investment in the health of your home, not just your water.
- Anyone with sensitive skin or ongoing skin irritation: Filtering chlorine from your shower and bath water can make a noticeable difference, particularly for those prone to dryness or eczema.
How to Choose the Right Water Filter System
When it comes to water filter systems, the most expensive option isn’t always the best option. When making your choice you should consider:
- Test your water: Start by understanding exactly what’s in your tap water. A proper water test will identify contaminants such as chlorine, sediment, heavy metals, or fluoride. This step removes guesswork and ensures you choose a system specifically designed to treat the issues present in your home’s supply. DIY water test kits can offer a general indication of water quality, but for more accurate and comprehensive results, a professional water test is recommended.
- Check for WaterMark certification: Always choose a system that is WaterMark certified. This confirms the product meets Australian safety, quality, and performance standards for drinking water systems, giving you confidence that it’s suitable for home use.
- Choose the right system type:
- Under-sink systems: Installed in the kitchen and connected to a dedicated tap, these are ideal for households wanting clean, filtered drinking and cooking water without taking up counter space.
- Countertop or jug filters: A simple, portable option that requires no plumbing. These are well suited to renters or smaller households looking for an easy, low-commitment solution.
- Whole-home systems: Installed at the point where water enters your property, these systems filter all water throughout the home, benefiting drinking water, showers, appliances, and plumbing.
- Consider water hardness: If your water contains high levels of calcium or other minerals, scale buildup can become an issue over time. In these cases, a system with scale-reduction capabilities can help protect your pipes and appliances while improving overall water quality.
- Evaluate flow rate and capacity: It’s important to choose a system that can keep up with your household’s water usage. A system with an insufficient flow rate may reduce water pressure, while one that is properly sized will deliver consistent performance across all taps and appliances.
- Assess maintenance requirements: Every filtration system requires ongoing maintenance. Look for systems with easily replaceable cartridges and a clear replacement schedule. Understanding how often filters need changing will help you maintain consistent water quality without unexpected interruptions.
- Factor in long-term costs: While upfront cost is important, it’s only part of the equation. Consider the ongoing cost of replacement filters, servicing, and any additional components. A slightly higher initial investment can often deliver better performance and lower maintenance costs over time, making it more economical in the long run.
💡Not sure what you need? The team at Hardie & Co Plumbing can help you understand your water, talk you through the best filtration options for your home, and recommend a solution that suits your household, budget, and usage.
What Does Water Filter Installation Involve?
- Water testing and consultation: The process begins with testing your water to understand exactly what’s in it. This helps determine the most appropriate filtration system for your home. At Hardie & Co, we include complimentary water testing as part of every consultation.
- System selection and sizing: Based on your test results, household size, and daily water usage, we will recommend a system that suits your needs. Getting the sizing right is especially important for whole-home systems, where consistent water pressure and flow must be maintained across all outlets.
- Plumbing assessment: Before installation, we will review your existing pipework, check water pressure, and assess available space to ensure the system can be installed safely and efficiently.
- Installation: The filtration system is then connected to your water supply and securely installed. Under-sink systems are typically completed within a few hours, while whole-home and reverse osmosis systems may take longer depending on the complexity of the setup and access to plumbing.
- Testing and handover: Once installed, the system is thoroughly tested. We will check for leaks, confirm water pressure, and run you through how the system works, including basic operation and maintenance requirements.
DIY vs. Professional Installation
Some water filtration systems are designed with simple, at-home setup in mind. Bench-top filters, jug systems, and certain shower filters can usually be installed without tools or specialised knowledge because they don’t connect to your home’s main plumbing.
However, once a system connects to your mains water supply, the requirements change. Under-sink filters, reverse osmosis systems, and whole-home filtration systems involve modifications to your plumbing and must be installed by a licenced plumber.
This ensures compliance and helps protect both the performance of the system and the safety of your home. Professional installation supports correct water pressure management, secure and watertight connections, and proper system sizing, particularly important for whole-home systems where consistent flow is essential across multiple outlets.
It’s also worth considering the risks of DIY plumbing. An incorrect connection or poorly sealed fitting can lead to leaks, bursts, and water damage. In many cases, home insurance policies may not cover damage caused by non-licensed work, leaving you exposed to unnecessary costs.
At Hardie & Co Plumbing, we install water filtration systems across Sydney’s Northern Beaches, North Shore, and Eastern Suburbs with a focus on precision, compliance, and long-term performance.
Backed by fully qualified Master Plumbers and a lifetime labour warranty, we handle everything from water testing and system selection through to professional installation, correct system sizing, and pressure management.
Ready to take control of your home’s water quality? Get in touch today and get a tailored solution that’s built for your home.
Clean Water Starts With the Right Installation
Clean, high-quality water doesn’t happen by chance. It comes from choosing the right system and installing it properly. When done right, the results are immediate and lasting: better-tasting water, healthier skin and hair, reduced wear on your plumbing, and complete confidence in what your household is using every day.
From under-sink systems to full whole-home filtration, the difference is in matching the right solution to your water, your home, and your usage…and having it installed by experienced professionals who know how to get it performing at its best.
If you’re ready to upgrade your home’s water, our team is here to make it simple. Get in touch today and take the first step toward cleaner, better water throughout your home.