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


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

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.

Disposing of used filters

The filter would need to be smashed the ceramic and media inside should go to rubbish and the plastic ends can be recycled as plastic. Some people use the media and ceramic to compost but I don't because they can have pharmaceutical and hormone traces and I grow food so I would not want that. For the media, it would be best to send that stuff to the landfill.


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

            In Depth

            Despite rumours put about my competitors - this product does not contain BONE CHAR

            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.
            • NSF 42 Certified - which guarantees materials are not extracted at all into the filtered water.
            • The plastic is recyclable ABS plastic

            Filter Parameter

            Bacteria, E-coli, Chlorine, Sediments, Nitrates, Fluoride, Hormones, Pharmaceuticals, Heavy Metals

            This product comes with a warranty. Terms apply. Please see the downloadable manual for warranty terms.

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