PiTec 2in1 under-sink water filter
Not just filtered. Spring water quality.
The mountain turns rain into spring water. We have built its path into an under-sink water filter that sits out of sight in your kitchen cabinet. You turn on the tap as always.
PiTec 2in1 · €469.–
No tank, no electricity, no waste water · 30-day right of return
Ralf Ohrmann recommends MAUNAWAI
From the very first glass, it was clear that there was something different about it.
Sports scientist and high performance coach
Drinks MAUNAWAI at home.
This is the PiTec 2in1
An under-sink water filter. Your tap stays.
The PiTec 2in1 under-sink water filter is connected to the angle valve under your sink and filters your tap water on its way to the tap. Contaminants come out, minerals stay in, all in a single cartridge.
- Contaminants out Microplastics, PFAS and chlorine come out.
- Minerals in Minerals and trace elements stay in, thanks to 21 mineral ceramics.
- Effortless No tank, no electricity, no waste water. A new cartridge about once a year.
- Fits almost anywhere 12.3 cm wide, narrower than a shoebox.
€469.– incl. VAT. 10-year guarantee on the housing, 30-day right of return.
Mauna
means mountain.
Wai
means water.
Spring water has come a long way, through sand, gravel and rock. Tap water has not. We give it that path back, right under your sink.
Your everyday life with it
Everything as usual. Only the water is different.
- Coffee and tea. Fresh and without any taste of chlorine, straight into the kettle.
- The water bottle for school. Filled at the tap in a few seconds.
- Cooking. Pasta water, soup, vegetables: you use the same tap you always use.
- No more crates. No carrying, no empties, less plastic waste.
„For 5 years now, our home has been unthinkable without the MAUNAWAI water filter. We love this fresh water quality.“
For families with young children
What your children drink should never be in question.
Children simply reach for the glass. They should be able to rely on what is in it. That is why, for 30 years, we have done just one thing: water filters that families trust.
No compromises. MAUNAWAI stands for the highest water quality.
Daniel Knoch
Founder and CEO
How it works
How does rain become spring water?
The mountain filters. Rain seeps through the earth and emerges below as clear spring water. Two things happen along the way. These are exactly the two things PiTec does.
In nature
In the PiTec under your sink
Step 1
out
Sand and gravel hold back what does not belong in the water.
The intensive filter holds back microplastics, PFAS and chlorine.
Step 2
in
The rock gives the water its minerals.
PI technology with 21 mineral ceramics keeps minerals and trace elements in and gives the water its spring water structure.
Result
Spring water emerges at the foot of the mountain.
Spring water quality comes from your usual tap.
Turn on the tap.
See what arrives in your glass.
The research comes from Japan. The cartridge comes from our own development.
How does the planet do it?
It all began with a question from Japanese basic research: How does nature regenerate water, and what gives a mountain spring its quality? Prof. Shoi Yamashita and Dr. Shinji Makino spent over 20 years researching the answer. This gave rise to PI technology.
In 1996, Maria Knoch, founder of MAUNAWAI, brought the first PI water system to Germany. Since then, we have continued to develop the technology, right up to the cartridge in your PiTec.
More about PI technology →The most common question
Will it fit under my sink?
Almost always. The PiTec 2in1 is narrower than a shoebox and also fits next to the trap.
- wide
- 12.3 cm
- high with wall bracket
- 34.4 cm
- installation height with room for changing the cartridge
- ≈ 40 cm
- empty, depth 11.5 cm
- 1.6 kg
Not sure? Send us a photo of your open base cabinet. We will tell you for certain whether it fits.
Send a photoInstalled in around 30 minutes.
- 1 Close the angle valve. The small valve under the sink.
- 2 Connect. From the valve into the filter, from the filter to the tap.
- 3 Position. Standing or on the wall.
- 4 Flush through. Done.
The easiest way is to have your plumber do it. In Germany and Austria, our installation partner can come to you on request.
For hard water
Simply add limescale protection.
If you wish, you can extend the PiTec 2in1 with a limescale protection module. It is the same module as in the PiTec Professional: it removes some of the calcium and magnesium from the water and binds the rest so that it no longer forms deposits. No salt, no salt tablets, no electricity.
View PiTec limescale protection → View PiTec Professional → Limescale throughout the house →
Evidence
What the laboratory measures.
PFAS, the so-called forever chemicals
Tougher than everyday life. The laboratory contaminated water with ten PFAS substances, totalling around 8.6 micrograms per litre. Far more than is usual in tap water.
Then filtered and measured. Each of the ten substances was determined individually.
Result: None of them could be detected any more. That is over 99.9% less.
over 99.9%
less of the ten PFAS substances tested¹
¹ PWU, DAkkS-accredited laboratory, test report H2017-05556. Applies to the intensive filter of the PiTec 2in1 and Kini. Other PFAS, such as TFA, were not part of the test.
More about PFAS in drinking water →Microplastics
come out.
With every MAUNAWAI system.
Chlorine, heavy metals, pharmaceutical and pesticide residues, hormones
are reduced.
Through the activated carbon intensive filter.
Minerals and trace elements
stay in.
The 21 mineral ceramics take care of that.
To be honest
What no laboratory measures.
How water tastes, and whether it comes close to the water of a good spring, is not found in any test report. That is our experience from 30 years, not a measured value.
For the vast majority of kitchens
Install once. Water like from the mountain, every day.
- Contaminants out: microplastics, PFAS over 99.9% less¹, chlorine, heavy metals and pesticides reduced
- Minerals in: 21 mineral ceramics in the same cartridge
- Your tap stays. 4 to 8 litres per minute, depending on water pressure
- No tank, no electricity, no waste water, no maintenance contract
- 10-year guarantee on the housing, 30-day right of return
- Device with first cartridge
- €469.–
- Cartridge, about once a year
- €269.–
- per day, calculated over five years²
- ≈ 85 cents
€469.– incl. VAT
I would rather get advice first¹ Ten PFAS substances tested, PWU, test report H2017-05556. ² Device plus four cartridges, €1,545.– over five years.
Have something else in mind?
Hard water, high usage
PiTec Professional
Four modules with limescale protection, 8 to 10 litres per minute.
€1,190.–
View →
No installation, also for renters
Kini water filter jug
If you would rather not touch the pipework at all.
from €140.–
View →
For the family
PiPrime gravity filter
Plenty of water, without a connection and without electricity.
from €429.–
View →
For the whole house
Peka domestic water filter
At the house water connection, for kitchen, bathroom and garden.
from €2,799.–
View →
Five questions you can ask any supplier
What to look for in an under-sink filter.
What stays in the water?
Do not just ask what comes out, but also what stays in.
With us Minerals and trace elements stay in, thanks to 21 mineral ceramics in the same cartridge.
Are there test values, with laboratory and conditions?
A good value names the laboratory, the date and how it was tested.
With us PFAS: over 99.9% less of the ten substances tested, DAkkS-accredited laboratory. The conditions are listed above under Evidence. Many further analyses are available from our customer service on request.
Do you need a second tap?
That often means a hole in the worktop.
With us No. Your tap stays as it is.
What does it cost over five years?
Device plus cartridges, not just the purchase price.
With us Around €1,545.–, which is about 85 cents per day.
How much space does it really need?
With connections and room for changing the cartridge.
With us 12.3 cm wide, just under 40 cm installation height with room for changing the cartridge.
To help you buy the right thing, an overview.
Three ways to filter tap water. PiTec is the third.
| What it is | What it’s good for | |
|---|---|---|
| Tap attachment | What it is is screwed onto the aerator | What it’s good for Quick to fit and compact. That’s precisely why it can’t hold much filter media. Designed to prevent limescale stains on the tap, not to remove pollutants from the water. |
| Filter jug | What it is is on the worktop and is filled by hand | What it’s good for An affordable way to get started, suitable for use anywhere, a little less convenient to handle. At MAUNAWAI, this is the Kini water filter jug. |
| Under-sink filters such as PiTec | What it is a drinking water filter, once connected to the cold-water pipe; also known in the trade as an under-sink water filter | What it’s good for After that, filtered water comes out of the usual tap. The filter is fully loaded, no refilling required, nothing on the worktop, nothing visible in the kitchen. |
An under-sink filter that leaves the minerals in the water.
Anyone wishing to filter their tap water thoroughly soon finds themselves faced with a dilemma. The methods that reliably purify the water strip it of everything. The methods that leave the water untouched do not add anything back to it.
| What comes out | What is lost | |
|---|---|---|
| Reverse osmosis | What comes out almost everything, very thoroughly | What is lost the minerals as well. Plus waste water, a tank under the sink and electricity |
| Pure activated carbon filter | What comes out Chlorine, taste, some of the pollutants | What is lost nothing, but he doesn’t give anything back to the water either |
| PiTec | What comes out Microplastics, PFAS, heavy metals, pesticides, chlorine | What is lost nothing that belongs in the water |
Five types of water filter compared: jug, activated carbon, osmosis and more → PiTec or reverse osmosis? The detailed comparison →
Frequently asked questions about under-sink water filters
Do I need a new tap?
No. PiTec is connected to the cold water pipe, and your existing tap then delivers filtered water. No second tap, no hole in the worktop.
Can I connect the filter myself?
In Germany, work on drinking water installations is carried out by registered installation companies. For a specialist, the connection takes around 30 minutes. In Germany and Austria, our installation partner can come to you on request.
How often do I change the cartridge, and how much does it cost?
About once a year, for €269.–. Changing it takes around two minutes, and the key is included. There are no other costs: no electricity, no salt, no waste water, no maintenance contract.
Will I lose water pressure at the tap?
The PiTec 2in1 delivers 4 to 8 litres per minute, depending on water pressure. That is enough for drinking and cooking in everyday life.
What is the difference compared to reverse osmosis?
Reverse osmosis removes the minerals along with the contaminants and usually requires a tank, electricity and a waste water connection. With PiTec, the contaminants come out and the minerals stay in, without any waste water.
Does PiTec also filter the water for the dishwasher?
No. PiTec sits in the pipe leading to your kitchen tap. The dishwasher, boiler and shower are connected to other pipes.
What if I rent or move house?
Nothing is drilled. The connection at the angle valve can be removed, and the filter moves with you. If in doubt, ask your landlord. The Kini works with no pipework at all.
Why do you say spring water quality?
Because PiTec recreates the path by which spring water forms in nature: contaminants out, minerals in. It is still your tap water, only better.
Under-sink water filter or under-counter water filter: what is the difference?
None. These are two names for the same type of filter: a unit installed under the sink and connected to the cold water line. Some call it an under-sink filter, others an under-counter filter. Ours are called PiTec 2in1 and PiTec Professional.
The path from the mountain. Now under your sink.
Not sure whether PiTec is right for you? A short phone call will clarify it. We will tell you honestly which system suits you, and if none does, we will tell you that too.
Or call: +49 3327-570-880, Monday to Friday from 9 to 17
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Sources
PWU, DAkkS-accredited laboratory: test report H2017-05556 (ten PFAS substances) · Verbraucherzentrale Hamburg, water filters, June 22, 2022 · WHO (2009), Calcium and magnesium in drinking-water · Customer reviews: Trusted Shops
As of: October 24, 2026 · Publisher: MAUNAWAI