Osmio Clarity Gravity Water Filter

In stock

SPECIAL OFFER: for a limited time only the Osmio Clarity comes with a free Osmio Sanser Sanitiser Spray worth £59! Valid as long as stock lasts! The Sanser makes it so easy to keep the Clarity clean, spray and rinse and you are done. The Sanser is a great device for cleaning and sanitizing anything in the home or workplace without single-use plastic or toxic fragrances.

Osmio Clarity Gravity Water Filter System The Osmio Clarity uses the best-performing gravity water filter elements on the market we know of, the Coldstream FTO+ filters made in the UK. The Housing is made using borosilicate glass and with a mango wood stand and lid, making it a beautiful and functional shrine to your blessed water for your home. Recommend for households up to 4 people. Filters are recommended to change every 6 months, but it depends on water quality. Please note, that the filters do not reduce calcium and magnesium which causes scale in kettles. Please see the test reports below to find out what it reduces.

Please note, that if you are purchasing a graded option, there will be some cosmetic imperfections. 

Frequently Bought Together
Total price

Osmio Clarity Gravity Water Filter

Comes complete with two Coldstream FTO Plus Filters, usually changed every 6 months, a 304 Stainless Steel Dispensing Tap, and a Mango Wood Stand and Lid.

– Suitable for 1-4 users per system

– High-performance filters – not designed for limescale reduction (up to 30% approximately is achieved) but have industry-leading performance for chemicals, heavy metals, plastic, hormones, fluoride pharmaceuticals, and a lot more.

The Osmio Clarity Glass and Beech Wood Housing is a thing of simple beauty and was inspired by the fact that water should be in glass when possible. The Osmio Clarity provides the least plastic contact of any water treatment product, as understand the concerns of those who want as little contact with plastic as possible. The Osmio Clarity minimizes this to only the silicone rubber gaskets for the stainless steel dispensing tap itself.

Where beautiful material and design meet high performance is where the Coldstream FTO+ Filters play an important role. High-level filtration is achieved through their unsurpassed technical understanding of filtration techniques and material performance, their comprehensive system and filter testing and manufacturing quality assurance and using unique high-performance ceramics made using their own hi-tech manufacturing processes.  All Coldstream filters are made at a renewable energy-powered and efficient manufacturing facility in King’s Lynn in the UK. The team of technical experts are some of the most experienced in their field, creating and delivering solutions in countries all around the world.

Features & Benefits

  • Glass Housing best material for water
  • Unique high-performance ceramic filters
  • Filter candles can be cleaned and re-used
  • Gravity-fed, easy to fill with a jug and change filters
  • Comes complete with beech wood stand and 304 stainless steel tap

Powerful Filters

The Coldstream filters are extremely powerful at filtering. They are even able to reduce fluoride (up to 97% – see test results). Doulton Super Sterasyl, Doulton ATC Super Sterasyl, and Black Berkey Filters do not reduce fluoride on their own, so you have to add extra filters (the PF4’s for the Doultons and the PF-2’s for the Black Berkey Filters). This is a problem because they screw onto the end of the main filters and take up space in the filtered water chamber. They are also made of plastic so the plastic is then sitting in your filtered water, not nearly as good as Coldstream who have solved it through their more advanced filtering technology.

Fluoride Removal –the other very important aspect of the Coldstream filters is that they reduce fluoride without using Activated Aluminawhich exchanges fluorides with aluminum hydroxide. Coldstream uses micro-ceramics to achieve this without migrating materials into the water through exchange making them far superior to older fluoride reduction technology.

Please note– Glass is FRAGILE so the product must be handled with care. The holes cut for the glass are not perfect and have slight shards that are covered by the rubber gaskets (on both sides of the filters and for the tap). It is, however, important to be vigilant about small shards that can occur whilst changing the filters so after cleaning it, you should clean it again or rinse it after installing new filters.

Do not overtighten the filters when installing as this may crack the glass. Use a jug to top the system up and be very careful handling it and especially with children around.

Please note that due to glass being hand made there can be up to 11% variation in overall product height and 5% variation in diameter of the glass housing.

Osmio Clarity Dimensions

A – 204 mm (8")

B – 660 mm (26")

C – 540 mm (21.5")

D – 240 mm (9.5")

E – 135 mm (5.3")

Filter Performance Data

The test reports for the filters showing the average results tested for a vast array of contaminants can be downloaded from the files section below.

Download the Osmio Clarity System Manual

Download the manual which covers the complete installation and maintenance guide for the system from the files section below

More Information
In DepthHousing Info:


Please note that due to glass being hand made there can be up to 11% variation in overall product height and 5% variation in diameter of the glass housing.

A – 204 mm

B – 660 mm

C – 540 mm

D – 240 mm

E – 135 mm

Upper Reservoir Holds approximately 7 litres of Untreated Water
Lower Reservoir Holds approximately 7 litres of Treated Water

Filtration Elements are NSF 42 Certified – which guarantees materials are not extracted at all into the filtered water.

Contaminant removal:

• Bacteria removal (E.coli / Cholera / Shigella / Typhoid / Klebsiella Terrigena) – 99.9999%
• Cyst removal (Cryptosporidium / Giardia) – 99.9999%
• Volatile Organic Contaminants – 94% – 99%
• Lead, Cadmium, Selenium, Zinc removal – 100%
• Heavy Metal Contaminants (to NSF 53c) – 97%
• Pesticide Contaminants – 99.9%
• Herbicide Contaminants – 99.9%
• Free Chlorine Removal (Chlorine Taste and Odour) – 99.9%
• Chloromine Removal – 99.9%
• Fluoride removal – 97.0%


• Flow Rate – min 1.0 L/hr max 2.5 L/hr (per filter)
• Operating Temperature – min 5°C / max 30°C
• Service Life – 6 months (recommended but varies due to water quality)

Filter Critical Dimensions

• Diameter – 2.9”
• Length – 8.0”
• Fitting type – ¼” BSP
• Fitting length – LM (26mm)
Filter ParameterBacteria, E-coli, Chlorine, Sediments, Fluoride, Pharmaceuticals, Heavy Metals
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Product Questions

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It states in the description the filters should last 6 months. How do I know when it is time to replace them? I've had mine for 4 months and assumed that the colour change in the filters was an indication of "wear". However, i've read that I need to clean the ceramic filters! So, how do I know when it is the right time - as surely the degree of use will impact on the need to replace.. Thanks
Question by: Amanda on 16 Aug 2022, 13:32
The filters will perform to their best for 500L per filter, after which reduction capacity will start slowly declining. In most circumstances the optimum filter change period is 6 months. If one person is using the system (or there is a low consumption for other reasons) it would be best to use one filter and blank one of the holes with a blanking plug, and still change the filter every 6 months.

Answer by: Irina Orlenko (Admin) on 17 Aug 2022, 09:37
I have just replaced the gravity water filters approximately a month ago. I filtered the water 4 times before using them but, after a month of constant use, the water taste like sand and at there is a fine white deposit at the bottom of the tank. I’ ve been drinking this water every day . Is it safe? Will it go away or these filters I’ve just bought should be replaced?
I’ve had the osmio gravity tank for more than 5 years but never had this problem before. Many thanks
Question by: Maria Molinari on 12 May 2023, 08:21
Best thing to do is send us by email a picture to info@osmiowater.co.uk so we can check. It is normal for there to be calcium like grainy deposits in the bottom chamber, but if there is for example a fault with one of the filters, then it may be letting some of the media that is inside it, out. Needs to be confirmed with some photos.
Answer by: Mark Kent (Admin) on 14 May 2023, 14:55
Does this come with any filters or do you have to buy them separately?
Question by: Charlotte on 21 Aug 2022, 14:50
The Osmio Clarity does come with two ceramic filters you do not need to buy those separately.
Answer by: Sharon Little (Admin) on 22 Aug 2022, 08:48
Hello, have you discontinued the beech finish? I much preferred it
Second question: does the product come with any guarantee or certificate of authenticity?
How do I know that an ebay seller is selling the real thing? Thanks in advance
Question by: hanna on 6 Jun 2023, 15:16
Yes the beech finish has been discontinued. The system does come with a 1 year guarantee, if you have purchased a system through one of our suppliers who is selling on eBay you can register the guarantee using this link https://www.osmiowater.co.uk/warranty-registration if you are unsure if the eBay seller is genuine then you can reach out on eBay for more information or you can buy the system direct from us https://www.osmiowater.co.uk/osgh1.html
Answer by: Sharon Little (Admin) on 6 Jun 2023, 16:25
Does this filter remove Graphene Oxide?
Question by: Michelle shiels on 12 Aug 2021, 10:02
This impurity is not tested. To ensure reduction we would recommend looking into getting an RO system.
RO systems reduce impurities on the ionic level and typically will do a 96-99% reduction of everything
Answer by: Irina Orlenko on 16 Aug 2021, 16:45