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Coldstream Sentry 4 Pack of FTO+ 2.9" x 8" Ceramic Gravity Water Filter

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Quick Overview

Coldstream Sentry FTO+ 2.9" x 8" Ceramic Gravity Water Filter 4 pack of replacement filters

Availability: In stock



4 pack of Coldstream Sentry FTO+ 2.9" x 8" Ceramic Gravity Water Filter

The best gravity filter on the market today

Compatible with Doulton British Berkefeld and Big Berkey Housings

Reduces sodium fluoride to high levels 97% (see test data) without any additional filters

The best buy of all and MADE IN THE UK

2.9" diameter by 8" length for superior filtration and faster flow rates

Osmio Staff Pick as best Gravity Filter on the market

The powerful ceramic gravity filter is compatible with all of the Doulton (British Berkefeld) and Big Berkey (and larger sizes) filter housings and makes a fantastic upgrade option as the filters have fantastic performance, particularly with regard to fluoride, hormone and pharmaceutical reduction in water. In other systems, such as the Doulton Super Sterasyl and Doulton ATC Super Sterasyl or the Berkey Black Elements, both of these require either the PF-4 or PF-2 Fluoride and Arsenic Filters (respectively) which take up space in the lower chamber which minimise the space available for storage of filtered water and adds cost to the process.

 Coldstream Gravity Ceramic Filter Test Results Coldstream Gravity Ceramic Filter Test Results

Coldstream Gravity Ceramic Filter Test Results


Superior Flow Rate and Filter Volume

The Coldstream filters are 1" longer and nearly 1" wider and therefore not only contain more filter media resulting in superior filtration, but also much faster flow rates. See how the filters compare in size to the Doulton Gravity Filters:

Coldstream vs Doulton Super Sterasyl Gravity Filters

Water Filters Made in Britain

Installation Video

Additional Information

Model Coldstream Sentry 4 Pack of FTO+ 2.9" x 8" Ceramic Gravity Water Filter
SKU CF163W-4
Brand Coldstream
Filter Parameter Bacteria, E-coli, Chlorine, Sediments, Nitrates, Fluoride, Hormones, Pharmaceuticals, Heavy Metals
In Depth 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 – 1.0 L/hr
• Operating Temperature - min 5°C / max 30°C
• Service Life - 6 months (recommended)

Critical Dimensions per filter

• Diameter – 2.9”
• Length – 8.0”
• Fitting type – ¼” BSP
• Fitting length – LM (26mm)

This superb gravity filter is compatible with the Doulton (British Berkefeld) filter housing, Propur Big and King and the Big Berkey Housing
  1. Great water review by Maria on 24/01/2019

    Love these filters, but the price has gone up so much I may as well get a whole house filter soon.

  2. Great stuff! review by DK on 22/01/2019

    Very happy with the filters. Been using these for a while now and I’m a very satisfied customer. Thank you.

  3. Filters review by Pete on 13/01/2019

    We have hard water where we live so we gave Osmio filters a try. They are very effective and our water now tastes like any bottled water that’s available.
    We were impressed with the next day delivery service and the quality of the filters at a competitive price.

  4. excellent review by Richard on 27/12/2018

    one of the containers had no lids on and when i picked out of box it fell through and smashed filter . They replaced straight away with out any fuss and they where first class people to buy from many thanks

  5. Brilliant! review by Mandy on 10/12/2018

    Excellent products, great service, fantastic prices - sincere thanks indeed.

  6. Excellent review by Milan on 11/10/2018

    Brilliant add to every household

  7. Gravity water filter. review by Pete on 04/06/2018

    Very pleased with filters.
    They make tap water taste as good as any bottled water product.
    Good value for money considering the life span of these filters. Many thanks from a satisfied customer.

  8. Excellent review by Sue on 13/05/2018

    Brilliant,easy to use and great tasting water

  9. Excellent! review by Julie jones on 18/08/2017

    Fab piece of kit and great service too, Thanks

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Product Questions

Hi can anyone tell me, how many litres of water the filters can pass before needing to be changed and must i change all 4 filters each time? If the answer is yes, all 4 filters must be changed, why does osmio water sell filters singularly? When would you buy a single filter? The difference between the Coldstream Sentry FTO+ and Doulton Super Sterasyl would also be helpful. Thanks

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