The science
How a filter the size of your hand makes your tap water taste better, explained simply.
What's in your tap water
Tap water is treated to be safe to drink. To keep it that way all the way to your home, water utilities add chlorine. It does its job, but it leaves the "swimming pool" taste and smell many people dislike. On its way through the pipes, water can also pick up sediment and, in older buildings, rust particles.
Purea® is designed to reduce these, right at the point where you drink.
How Purea® filters
Pre-filtration
A first layer holds back visible particles: sediment, sand and rust from the pipes.
Activated carbon
The heart of the cartridge. Its porous surface captures chlorine and the compounds that cause unpleasant tastes and odours.
Fine filtration
A final filtration stage down to 0.1 micron refines the water before it reaches your glass.
Why activated carbon?
Activated carbon is one of the most widely used materials in water filtration. Each grain is covered in microscopic pores, which gives it a huge surface area. As water flows through, compounds like chlorine stick to that surface: this is called adsorption. The water goes through, the unwanted taste stays behind.
What Purea® keeps
Unlike reverse osmosis, Purea® does not strip your water down. Calcium and magnesium, the minerals naturally present in tap water, stay in. That's why a TDS tester (which measures dissolved minerals) will barely move after filtration: the minerals are still there, the chlorine taste is not.
The proof is in the cartridge
After a few weeks of use, open your used cartridge and compare it with a new one. What has built up inside is what Purea® held back, glass after glass.
Good to know. Purea® is designed for water from the public supply, which is already safe to drink. It improves taste and comfort; it does not make non-drinking water safe. Results vary with the quality of your local water and how often you change the cartridge.