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British Berkefeld Ultra Sterasyl Triple Stage Ceramic Gravity Feed Filter – City Or Well Water – For Customers Without Fluoride Concerns – Fits Berkey And All Gravity Filter Systems


(2 customer reviews)

Elevate your home’s water quality with the British Berkefeld Ultra Sterasyl Ceramic Filter Cartridge:

  • Superior Three-Stage Filtration: Unites the efficiency of ceramic and activated carbon for exceptional water purity.
    • Sub-Micron Ceramic Layer: Captures particulate matter, bacteria, cysts, and turbidity, ensuring cleaner water.
    • Silver-Infused Ceramic: Enhances bacteriostatic and self-sterilizing properties, reducing maintenance.
    • Activated Carbon Stage: Eliminates/reduces chlorine, VOCs, solvents, Pharma, and broad spectrum contaminantsimproving taste and odor.
  • Versatile System Compatibility: Ideal for gravity and low-pressure systems, offering flexibility in various water setups.
  • Maintenance Made Simple: Self-sterilizing feature negates the need for post-cleaning sterilization.
  • Durable and Efficient Design: Ensures the life and continued quality of your filters.


  • Flow Rate: Optimized at <1/3 gal/min.
  • Dimensions: 56 mm (W) x 56 mm (D) x 228 mm (H).
  • Weight: 0.270 kg.
  • Efficiency: >99.99% filtration at 0.5 – 0.8 microns.
  • Construction: Premium ceramic with silver and activated carbon.
  • Compatibility: Fits most gravity feed brands including Berkey
  • Certification: WRAS certified, NSF/ANSI 53 certified


Special Note on Fluoride: While the British Berkefeld W9121200 Ultra Sterasyl effectively removes a variety of contaminants, it is not designed to remove fluoride. It is optimal for water sources without fluoride concerns, such as well water. If fluoride removal is a priority, we recommend our British Berkefeld Ultra Fluoride Filter, specifically crafted to address this need. Not sure if you have Fluoride? Check EWG Tapwater Database and select “Other Detected” to check Fluoride, you can also google if your water provider adds Fluoride to the water.

Transform Your Water Experience: Choose the Ultra Sterasyl filter for its advanced technology, ease of maintenance, and proven durability, making it a wise choice for households without fluoride concerns. Elevate your water to Berkefeld purity and taste the difference in every drop. Your journey to safer, better-tasting water starts here.







Lab Tests

Dear Valued Customers,

Welcome to our community of British Berkefeld filter users! We understand many of you are transitioning from Berkey filters. For those new to Berkefeld, you may notice a difference in the initial flow rate. Berkefeld filters are designed for extensive purification, leading to a slower flow at the start. This slower rate is a normal part of the filtration process, indicative of the thorough cleaning your water is receiving.

A helpful tip for all our customers: keeping the top reservoir full is a simple way to improve the flow rate. This added pressure assists the filters in working more efficiently. Over time, you’ll notice that the flow rate increases to about 1L per hour per filter. British Berkefeld’s design is a fine balance between efficiency and quality, ensuring that your water is not only safe but also tastes great.

Should you have any questions or need assistance with your new filter, our support team is ready to help. 

Thank you for choosing Greenfield Water for your water filtration needs. We’re committed to providing you with a superior experience.

-The Greenfield Water Team

Our replacement ceramic filter for use within ALL Gravity Filter Systems: Ultra Sterasyl. Silver impregnated ceramic microfilter with granular activated carbon and heavy metals removal media.

The Ultra Sterasyl is handmade by UK professionals to reduce common contaminants like bacteria, chlorine, organics such as pesticides and herbicides, lead and some pharmaceuticals. Designed for use to significantly improve the clarity, taste and odour of drinking water.

Long Lifetime

Made From Natural Raw Materials

Ultra Sterasyl Benefit

It is recommended to change these filter candles every 6 months for maximum efficiency, however the outer shell can be cleaned with a brush or scotch pad to prolong their lifespan. (Some customers last 12 months)

A ceramic water filter inspired by nature and made from natural raw materials to deliver superior flow rates in gravity water filters for reliable ceramic filtration technology – without the removal of naturally occurring minerals from your water.

The Ultra Sterasyl Candles remove/reduce broad spectrum contaminates, suspended solids, turbidity, parasites, pathogenic bacteria, chlorine, bad taste & odor and have added lead and heavy metal removal capabilities.

2 reviews for British Berkefeld Ultra Sterasyl Triple Stage Ceramic Gravity Feed Filter – City Or Well Water – For Customers Without Fluoride Concerns – Fits Berkey And All Gravity Filter Systems

  1. marta greenleaf (verified owner)

    I have two Berkeys and, I bought one set of filters to compare the taste…much improvement with the Greenfield filters. I’m ordering another set today!

  2. Martha D. (verified owner)

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