Water filters for the hom 

Water filter or water purifier: they’re not the same thing

The water filters in this category are designed for treating water at the household level or for an entire system. They are used to trap impurities, protect plumbing, improve the quality of raw water, or prepare water for further treatment.

Conversely, if your main aim is to improve the quality of your drinking water in the kitchen, you should opt for an under-sink water purifier. Water purifiers can operate independently at the point of use, whereas filters in this category are installed upstream, as part of the main plumbing system.

Filtration works in stages

In practice, it is difficult to filter everything effectively using a single filter. This is why a comprehensive system often involves several stages of filtration, each targeting a specific type of impurity or pollutant.

The first stage is often pre-filtration: this serves to remove the coarsest particles, such as sand, silt, rust, certain organic debris or deposits originating from the mains supply or the water source used.

Next, the water is further purified using more specialised cartridges: sediment, activated carbon, iron removal, or other filter media depending on the actual water quality.

Make a clear distinction between filter holders and cartridges

A filter holder is not the filter media. It is the housing or filter body into which a cartridge is inserted. The cartridge, on the other hand, contains the filter media or active material that actually treats the water.

In other words:

• the filter holder = the tank, the support, the mounting structure;
• the cartridge = the filter element to be selected as required.

This is a key point, as a single tank can accommodate a wide variety of cartridges: sediment, activated carbon, combination cartridge, iron removal, etc.

A simple example of a water filtration system for a home

A basic, consistent configuration might look like this:

With this basic system, you can already achieve good-quality water for general domestic use in many cases. If a water test subsequently reveals a specific problem, a suitable additional treatment step can be added.

For example, if the water contains high levels of iron, you can add a filter holder with an iron-removal cartridge. If the water comes from a well, a borehole or a rainwater tank and there is a microbiological risk, you can add a UV steriliser to the system.

What about UV sterilisers in this category?

The UV sterilisers shown here have their place in a treatment process, but it is important to be clear: a UV unit does not filter. It does not remove sand, sludge, rust or particles. Its role is to destroy microorganisms using UV-C light.

It can therefore be said that UV complements a filtration system, but it does not replace the mechanical filtration and activated carbon stages. This is particularly relevant for water from boreholes, wells or rainwater tanks, as the product sheets in this category already indicate.

In what situations is this category particularly useful?

• for a home connected to the mains water supply with a high level of impurities or limescale,
• for a system using drilling, a borehole or a spring,
• to treat rainwater collected in a tank,
• to protect pipework, a pump, a water heater or an additional treatment unit installed downstream,
• to pre-treat the water before it passes through a purifier or another more advanced system.

Conclusion

The water filters in this category are primarily designed for whole-house use and for general water treatment. They are not intended as drinking water purifiers, but rather as a multi-stage filtration system, tailored to the actual water quality and the needs of the household.

The right choice is rarely to look for a filter that ‘does it all’, but rather to build a coherent system: pre-filtration, a suitable cartridge, followed by targeted additional treatment if necessary.

FAQ – Water filters for the home