Does a Shower Filter Remove Chlorine?
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A well-designed one can. Here is how ClearFlow approaches free chlorine, and what the test number means.
A shower filter designed for chlorine reduction can significantly reduce free chlorine in shower water, but the result depends on the media, flow, temperature and test conditions.
FiltraZen ClearFlow achieved up to 98% free chlorine reduction under specified laboratory conditions. Its current four-stage cartridge combines a sediment shell, Activated Carbon Fibre (ACF), calcium sulfite and KDF-55 redox media.
Why is there chlorine in tap water?
Water utilities use chlorine to disinfect drinking water and help keep it safe as it travels through the distribution network. Disinfection is an essential part of municipal water treatment.
By the time water reaches the bathroom, some people notice the familiar chlorine smell more strongly in warm water and steam.
Why reduce chlorine in the shower?
Your shower is a place where warm water is in close contact with your skin and hair. People commonly choose shower filtration because they prefer less chlorine odour and a different water feel. ClearFlow is designed to reduce free chlorine at the point of showering.
A shower filter should not be presented as a medical treatment, and it is not needed to make compliant mains water safe to drink.
How does ClearFlow reduce free chlorine?
Shower conditions are demanding: the water is warm, moves quickly and spends only a short time in the cartridge. ClearFlow therefore uses multiple media rather than relying on a single layer.
Current ClearFlow four-stage design
Sediment shell
Captures visible and suspended particulate matter such as dirt, grit and rust. The transparent housing makes this stage visible.
Activated Carbon Fibre (ACF)
A high-surface-area adsorption stage used for chlorine, odours and organic compounds that can contribute to a pool-like smell.
Calcium sulfite
A fast-reacting water-treatment medium used for free-chlorine reduction, including in warm shower water.
KDF-55 redox media
A copper-zinc medium that supports chlorine reduction and helps reduce some water-soluble metals through redox chemistry.
How much chlorine does ClearFlow reduce?
In independent laboratory testing, the complete ClearFlow filtration system achieved up to 98% free chlorine reduction. Testing was carried out at approximately 1.2 ppm free chlorine, 6.2 L/min flow and 35 psi pressure, with chlorine measured before and after filtration.
Free chlorine and chloramine are not the same
Some Australian water supplies use chloramine rather than free chlorine. Chloramine is chemically different, so performance against it can differ. ClearFlow's up to 98% result applies to free chlorine only. Chlorine vs chloramine, explained.
What a shower filter will not do
ClearFlow is not a water softener. It is not designed to remove hardness minerals such as calcium and magnesium. If scale and hard-water marks are your main concern, look at a dedicated water-softening or hardness-treatment solution.
Frequently asked questions
Does a shower filter get rid of the chlorine smell?
ClearFlow is designed to reduce free chlorine, which is commonly associated with the pool-like smell some people notice in tap water. Results depend on the local supply and shower conditions.
Is chlorinated tap water unsafe?
No. Chlorine is used to help keep drinking water microbiologically safe. Shower filtration is about changing the shower-water experience, not making unsafe water safe.
Does one ClearFlow medium remove 98% of chlorine by itself?
No individual-media claim is made. The up to 98% result was recorded for the complete ClearFlow system under specified laboratory conditions.
Will ClearFlow work the same in every home?
No filtration product performs identically in every home. Water chemistry, chlorine concentration, temperature, pressure, flow rate and cartridge age can all affect results.
More from the ClearFlow Knowledge Series
Testing & performance disclaimer. ClearFlow has been evaluated through laboratory testing under controlled conditions. Reported performance figures may vary with water quality, chlorine concentration, temperature, pressure, flow rate, cartridge age and other factors. The up to 98% free-chlorine reduction figure represents a maximum laboratory result under the specified test conditions and is not a guarantee of the same reduction in every household or water supply.
ClearFlow is designed to reduce free chlorine and capture sediment and particulate matter. It is not a water softener and is not designed to remove hardness minerals such as calcium and magnesium. Chloramine performance may differ from free-chlorine performance.
Ready to see ClearFlow in your shower?
The Shower Kit includes a spare capsule: about six months of filtered showers.
Written by Filtrazen Editorial Team
