Why filter at all

Tap water is safe. That's not the same as good.

The UK's water treatment does the important work — but it isn't designed to deal with everything sitting in the pipes between the treatment works and your kitchen tap.

Hard water, everywhere

Large parts of England have some of the hardest water in Europe — leaving limescale in kettles and pipes, and a chalky edge to the taste.

Older pipework

Many homes built before 1970 may still be connected via lead or galvanised steel supply pipes, which can leach into water that's sat in the line overnight.

What treatment misses

Fluoride is added deliberately in some areas, and things like PFAS ("forever chemicals") and microplastics aren't part of what standard treatment is designed to filter out.

A quick word on chlorine

Chlorine's doing an important job on the way to your house — keeping the water safe as it travels through miles of pipe. By the time it's in your glass, though, that job is done. All it's really contributing at that point is a faint swimming-pool taste. Stage 2, our carbon block filter, takes it back out.

How it works

Inside every Clarivo system

Every system is built around the same core stages. Plus and Premium layer on extra protection, stage by stage.

01

Sediment pre-filter

Strips out dirt, sand, rust and silt, protecting every filter that comes after it.

All packages
02

Carbon block filter

Removes chlorine and chloramine — and the taste and smell that come with them.

All packages
03

Extra guard filter

A second fine sediment & carbon stage that catches what stages 1–2 miss, extending membrane life.

Plus & Premium
04

Reverse osmosis membrane

The core of the system — rated to reduce dissolved solids, heavy metals, lead, fluoride and microplastics by up to 99% (manufacturer spec, test data on request).

All packages
05

Post-carbon polish

One last carbon polish for the cleanest possible taste, right before the water reaches your tap.

All packages
06

Remineralisation filter

Adds calcium and magnesium back in, balancing pH and rounding out the taste RO can strip flat.

Plus & Premium
07

UV sterilisation

Rated to neutralise up to 99.9% of bacteria and viruses when the bulb's replaced on schedule.

Premium only
Included in Standard, Plus & Premium
Added from Plus
Added in Premium only

What gets removed

Across the full system, here's what's filtered out of your water before it reaches the tap.

Chlorine & chloramine
Limescale & hardness minerals
Lead & heavy metals
Fluoride
Microplastics
PFAS ("forever chemicals")
Bacteria & viruses Premium (UV)

Based on the manufacturer's certified specifications for each filter stage. Actual results depend on your local water composition — we'll show you the test data during your free water test.

Deeper questions

The science, in a bit more detail

TDS (total dissolved solids) is a quick read of everything dissolved in your water — minerals, salts, some metals — measured in parts per million. It's a useful headline number, but it won't tell you what those solids actually are, and it can't detect bacteria, chlorine by-products or PFAS on its own. That's why we pair the reading with a proper look at your water, not just a number on a screen.

Not for safety — but usually for taste. RO membranes are fine enough to strip out the good minerals along with everything else, which is what gives RO water its slightly flat edge. Stage 6, on Plus and Premium, adds calcium and magnesium back in. Standard skips it and the water's still perfectly good to drink; it just tastes a touch flatter to some people.

Book your free water test