Best Water Filter Options for Your Home
A simple guide to selecting the correct geyser size, type and setup for homes, renovations and building projects.
A simple guide to choosing the right water filtration setup
Clean water is something every home depends on. Whether it is used for drinking, cooking, washing or general household use, better water quality can make a noticeable difference in daily life.
Water filters are designed to help reduce unwanted particles, improve taste and support cleaner water throughout the home. The right option depends on where the water is being used, what you want to filter out and how much water the household uses every day.
Before choosing a filter, it helps to understand the different types of water filter options available and where each one works best.
Start with what you want to improve
Not every home needs the same type of water filter. Some households mainly want better-tasting drinking water, while others need to reduce sediment, protect appliances or filter water before it moves through the full property.
Before buying a filter, consider what the main concern is.
Common water concerns include:
- Sand or dirt in the water
- Rust particles
- Poor taste
- Unpleasant smell
- Cloudy water
- Sediment build-up
- Protecting taps, geysers and appliances
- Cleaner drinking and cooking water
Once you understand the problem, it becomes easier to choose the correct filter system.
Point-of-use filters
Point-of-use filters are installed at a specific place where water is used. This is usually under a kitchen sink, at a drinking water tap or connected to a countertop filter system.
These filters are a good option if the main goal is to improve water used for drinking and cooking. They are practical for kitchens, smaller homes, apartments and households that do not need filtered water throughout the entire property.
Point-of-use filters are commonly used for:
- Drinking water
- Cooking water
- Kitchen sinks
- Countertop systems
- Under-sink systems
- Small household filtration
This type of filter is often simple, affordable and easy to maintain.
Whole-house water filters
Whole-house water filters are installed at the main water supply point before water moves through the rest of the home. This means the water is filtered before it reaches taps, showers, toilets, appliances and geysers.
This is a good option for households that want cleaner water throughout the property, not only at one tap.
Whole-house filtration can be useful for:
- Larger homes
- Properties with multiple bathrooms
- Homes using tank water or borehole water
- Reducing sediment before water enters the plumbing system
- Protecting appliances and geysers
- Improving water quality across the whole house
Because this type of system filters more water, it is important to choose the correct size and filter type for the household’s water demand.
Sediment filters
Sediment filters are used to reduce particles such as sand, dirt, rust and other visible matter in the water. These filters are often used as a first stage in a filtration system.
A sediment filter is especially useful where water has visible particles or where water comes from tanks, boreholes or older pipe systems.
Sediment filters help protect:
- Taps and mixers
- Geysers
- Washing machines
- Dishwashers
- Water pumps
- Other filter cartridges
- Plumbing fittings and valves
If sediment is not filtered out, it can build up over time and affect water flow, appliances and plumbing components.
Carbon filters
Carbon filters are commonly used to improve water taste, smell and general drinking quality. They are often found in household filtration systems and are popular for kitchen drinking water.
These filters are useful when the water is not visibly dirty, but the taste or smell is not ideal.
Carbon filters are commonly used for:
- Drinking water
- Kitchen filtration
- Improving taste
- Reducing unwanted smell
- Countertop systems
- Under-sink systems
Carbon filters are often used together with sediment filters for better overall filtration.
Inline filters
Inline filters are installed directly into a water line. They are compact and practical for specific applications where water needs to pass through a filter before reaching an outlet or appliance.
They are commonly used for drinking water systems, fridges, ice machines and smaller point-of-use setups.
Inline filters are useful because they are neat, space-saving and can be installed out of sight.
Countertop filters
Countertop water filters are placed on or near the kitchen counter and usually connect to the tap. These systems are popular because they are easy to access and do not always require major plumbing changes.
They are a practical option for households that want filtered drinking water without installing a full-house system.
Countertop filters are suitable for:
- Kitchens
- Rentals
- Smaller households
- Easy-access drinking water
- Homes where permanent installation is not preferred
They are simple, convenient and usually easy to maintain.
Under-sink filters
Under-sink filters are installed below the kitchen sink and filter water before it reaches a dedicated tap or outlet. They are a cleaner-looking option because the system is hidden inside the cupboard.
These systems are good for homeowners who want a more permanent drinking water solution without having the filter visible on the counter.
Under-sink filters are commonly used for:
- Kitchen drinking water
- Cooking water
- Cleaner countertop space
- More permanent installations
- Homes with a dedicated drinking water tap
They may require a bit more installation work, but the result is neat and practical.
Choosing the right filter cartridge
The cartridge is the part of the filter system that does the actual filtering. Different cartridges are designed for different purposes, so it is important to choose the correct one.
Common filter cartridge types include:
- Sediment cartridges
- Carbon cartridges
- Pleated cartridges
- String-wound cartridges
- Replacement cartridges for specific systems
Choosing the wrong cartridge can reduce the effectiveness of the filter or affect water flow.
Always check the filter housing size, water flow requirements and what the cartridge is designed to filter.
Water pressure and flow rate matter
A water filter should suit the water pressure and flow rate of the home. If the filter is too small for the system, it can reduce water flow and make taps feel weak.
This is especially important for whole-house filters, larger households and homes with multiple bathrooms.
Before installing a filter, consider:
- How many people live in the home
- How many taps and bathrooms are used
- Whether the filter is for one tap or the whole house
- The size of the filter housing
- The type of cartridge
- The water pressure
- Maintenance access
A correctly sized system will work better and last longer.
Filters need maintenance
Water filters only work properly if they are maintained. Over time, filter cartridges become full of trapped particles and need to be replaced.
If a cartridge is not replaced when needed, it can reduce water flow and may no longer filter effectively.
Maintenance depends on:
- Water quality
- Amount of water used
- Type of filter
- Type of cartridge
- Manufacturer recommendations
A good habit is to check filters regularly and keep replacement cartridges available.
Which option is best for your home?
The best water filter depends on the household’s needs.
For better drinking water, a countertop or under-sink filter may be enough.
For visible sediment, a sediment filter is usually a good starting point.
For the whole property, a whole-house filter may be the better choice.
For taste and smell, a carbon filter is often useful.
The right setup may also combine more than one filter type, especially when water quality issues are more noticeable.
Need water filters or
replacement cartridges?
Rock Building Supplies stocks water filters, filter housings, cartridges and plumbing essentials for homes, kitchens and general water quality improvements.
Speak to our team for practical advice and product availability for your next water filtration setup.