Frequently asked questions
Ayus installs and maintains 4-stage water filters at home, hidden under the kitchen sink. Here are the answers to what we are asked most. If yours is not here, ask us.
No question with that word. Ask us directly.
Water5
Isn't tap water safe?
It is. Mains water in Portugal meets every legal parameter. The filter improves the taste and adds magnesium; it's not a safety issue.
Does the filter remove limescale?
No. It keeps the minerals and adds magnesium. If you live in a hard water area, we'll tell you before booking the visit.
Does the filter change how the water tastes?
Yes. It removes the chlorine taste and smell, and the magnesium gives the water a rounder taste.
Can I use filtered water for cooking, coffee, tea and ice?
You can. Without the chlorine taste, your coffee, tea, ice and food taste better.
Is filtered water suitable for babies?
Mains water in Portugal meets the legal standards. For preparing baby formula, follow your paediatrician's advice. The filter improves the taste of the water and doesn't replace medical advice.
The filter4
Is it reverse osmosis?
No. Reverse osmosis removes almost all the minerals from the water. Our filter uses ultrafiltration, which lets the minerals through.
Does the filter hold back microplastics?
Yes. The pores of the ultrafiltration membrane measure [X] µm, and anything larger doesn't get through. A microplastic is at least 1 µm.
Does it need electricity?
No. It runs on mains water pressure alone, with no pump and no tank.
Does the filter waste water?
No. Unlike reverse osmosis, it doesn't send water down the drain. And it doesn't need a tank: the water is filtered the moment you turn on the tap.
Installation4
Do I need to change my tap?
Yes, to a 3-way tap, which we fit in the same hole as your current one. It gives you hot, cold and filtered water, and you choose the finish.
Where does the filter go and how much space does it take?
It sits out of sight under the kitchen sink. It takes up [MEDIDAS A CONFIRMAR].
How long does the installation take?
About [X] hour, with no dust. By the time we leave, you've got filtered water at the tap.
Do I need any building work?
No. The 3-way tap uses the hole of your current tap and the filter sits under the sink. We install in flats and in houses.
Maintenance1
How often are the filters replaced?
[INTERVALO A CONFIRMAR]. We'll message you on WhatsApp when it's time and book the replacement.
The service4
Do you install all over the country?
In Lisbon we can come right away. In other districts, we install by appointment: leave us your details and we will arrange a date.
What's the warranty?
The equipment has the 3-year legal warranty. And since the sale happens in your home, you have 30 days to change your mind.
Does the visit cost anything?
No. The visit and the test of your water are free, with no commitment.
Can I install it in a rented home?
[A CONFIRMAR]. The 3-way tap uses your current tap's hole, so there's no building work and no new holes.