British Berkefeld 7″ Ultra Sterasyl Ceramic Water Filters (Set of 2)
The British Berkefeld 7-inch Ultra Sterasyl ceramic filters deliver powerful multi-stage filtration designed specifically for gravity water filtration systems.
Each filter features a micro-porous ceramic outer shell that physically blocks bacteria, cysts, and sediment. Inside the filter, activated carbon filtration media helps reduce chlorine, organic chemicals, and other contaminants while improving the taste and clarity of drinking water.
Ultra Sterasyl filters are certified by NSF International to four drinking water standards, verifying their performance through rigorous third-party testing.
This set of two filters provides reliable ceramic filtration for everyday drinking water while maintaining a simple gravity-powered design that requires no electricity or plumbing.
Ultra Sterasyl filters are widely used for home kitchens, emergency preparedness, off-grid living, camping, and everyday drinking water filtration.
NSF Certified Filtration
British Berkefeld Ultra Sterasyl filters are certified by NSF International to four drinking water standards, confirming their performance for contaminant reduction and material safety.
✔ NSF/ANSI Standard 42 – Reduction of chlorine, taste, and odor
✔ NSF/ANSI Standard 53 – Certified for health effects contaminant reduction such as lead
✔ NSF/ANSI Standard 372 – Certified lead-free materials
✔ NSF/ANSI Standard 401 – Reduction of emerging contaminants
These certifications confirm that the filters meet strict third-party testing standards for drinking water safety and filtration performance.
Key Benefits
✔ Helps remove bacteria, cysts, and sediment
✔ Reduces chlorine and organic chemicals
✔ Improves taste and odor of drinking water
✔ Helps reduce lead and heavy metals
✔ Helps reduce microplastics and turbidity
✔ Gravity powered – no electricity required
✔ Cleanable ceramic shell helps extend filter life
✔ Helps retain beneficial minerals naturally found in water
Contaminant Reduction
| Contaminant | Reduction |
|---|---|
| Bacteria | ✔ |
| Cysts | ✔ |
| Chlorine | ✔ |
| Lead | ✔ |
| Microplastics | ✔ |
| Sediment & Turbidity | ✔ |
| Organic Chemicals | ✔ |
| Taste & Odor | ✔ |
Ceramic gravity filters combine mechanical ceramic filtration with activated carbon, helping reduce bacteria, sediment, chlorine, heavy metals, and other contaminants from drinking water.
Specifications
| Feature | Details |
|---|---|
| Manufacturer Model | W9121226 |
| Filter Type | Ceramic Gravity Filter |
| Filter Length | 7 inches |
| Filter Capacity | 800 gallons per filter |
| Total Capacity | Up to 1,600 gallons per set |
| Replacement Interval | Replace every 6–12 months depending on water quality |
| Weight | 1.6 lbs (set of two) |
| Product Dimensions | 3 × 3 × 7 inches per filter |
| Color | White |
| Country of Origin | Made in Britain |
Installation: Upper chamber of gravity filtration systems
Each filter includes the wing nut and washer required for installation.
Filter Life
Each Ultra Sterasyl ceramic filter can treat approximately 800 gallons of water before replacement is recommended.
A set of two filters can treat up to 1,600 gallons, typically lasting 6–12 months depending on water quality and usage.
The ceramic outer shell can also be cleaned periodically to help maintain filtration performance.
Designed for British Berkefeld Gravity Systems
The Ultra Sterasyl ceramic filter is specifically designed for British Berkefeld gravity filtration systems.
The ceramic outer shell provides mechanical filtration that physically blocks bacteria and sediment, while the internal activated carbon helps improve taste and reduce chlorine and organic compounds.
This combination creates a reliable gravity filtration system that works without electricity or plumbing.
System Compatibility
The number of filters used depends on the gravity system size.
| System | Number of Filters |
|---|---|
| Baron Berkefeld | 1 Filter |
| Duchess Berkefeld | 2 Filters |
| Duke Berkefeld | 2–4 Filters |
| Prince Berkefeld | 2–4 Filters |
| King Berkefeld | 2–8 Filters |
| Borosilicate Glass System | 2–4 Filters |
| Stoneware System | 2–4 Filters |
Using multiple filters increases filtration speed and total system capacity.
Gravity Water Filter Comparison
Many gravity filtration systems appear similar but use different filtration technologies.
| System | Filter Technology | Bacteria Filtration | Fluoride Reduction |
|---|---|---|---|
| British Berkefeld / Doulton | Ceramic + Carbon | ✔ | Optional |
| Berkey | Carbon block | Limited | Optional add-on |
| Alexapure | Carbon composite | Limited | ✔ |
| Culligan Gravity Filters | Carbon | Limited | Some models |
Ceramic filtration remains popular because the micro-porous ceramic shell physically blocks bacteria and sediment, while carbon media improves taste and reduces chemicals.
What’s Included
• 2 × British Berkefeld 7″ Ultra Sterasyl Ceramic Filters
• 2 × Installation wing nuts and washers
✔ Ideal for gravity water filtration systems that require reliable ceramic filtration for bacteria, chlorine, sediment, and contaminant reduction.
Ann L. –
i had a decision and chose the one to change every 6 months. i have a bunch of dogs that drink this water as well as my sister and i. i believe i make the correct choice!
John S. –
All is good, arrived as promised.
Anonymous –
Prompt and easy ordering
Linda S. –
I wasn’t too sure about them at first. The filtration rate was really slow, but they’re ok now. I’ve gotten used to this new timing.
Lise Patterson –
Great product. I’ve been using them for years. They’re much easier to use that the Berkey filters which have to be primed and I trust the company implicitly.
Tracy –
Appreciated the support and unsolicited phone call from your office to help with my questions.
Patricia Savage –
It seems to work well.
Julia M. –
Quick, easy, buying and shipping, simple set up and works great.
Lydia Laroche –
I wish they would last at least a year but we like them.
Richard M. –
Very easy to install in my Berkey and is functioning properly.
Kelly Williamson –
So far so good, water tastes great and I’ll have to trust you that it is filter what you claim it is.
Steve Fleckenstein –
Great service, good price, fit my old Berkey so I am back in the great tasting water business!
peter levine –
Very good people. Can sense the sincere desire to be helpful in every way.
Janet D. –
So glad that Berkey recommended you! I have been waiting for a very long time to replace my black filters.
After the initial filtering, the second time it took quite a long time for the water to filter through. But I think it is improved in thetime frame. The only disappointing thing is they do not have as long as a lifetime if I have calculated it right. Otherwise, I am pleased and thank you very much.
Leah G. –
Give it time – they work well. First filter can take 12-24 hours. I didn’t know that until I contacted about why it wasn’t filtering … knowing about the extremely long first filter helped. After that it does speed up.
Mary C. –
Filters a little slow, but good tasting water. I’d buy again.
Marcy J. –
These are just as described. I really like that they do not need to be primed. Work great in my Berkey.
Jennie R. –
Great company and I am very happy to have an alternative to the berkey filters that are no longer an option.
Rob B. –
The product came as ordered.
Anonymous –
These filters were easy to install and I’m glad they make great replacements for the Berkey filters. My mom was able to get them for her Berkey.
Susan S. –
These filters fit perfectly in my Berkey unit and don’t require priming.
Anonymous –
No complaints. It was an easy process. I like the automatic refill option.
Isaac –
I bought these filters as spares with my original purchase. I’m hoping the original filters meet the published lifespan.
Jackie Bennett –
Being a first time buyer of this product, I wish there would have been more info about them on the box, like, how long are they good for and should they be rinsed off before installing. Other than that, I’m very satisfied with the filters, the packaging and the delivery time. Thanks
Wendy W. –
Great product and fast shipping
Michael –
Thank you
William Cook –
Water tastes great. Filters fit correctly in my Berkey Light.
linda k. –
Great price! Working great so far!!,
Leigh Throckmorton –
Used them many years ago before black ones came out. Like having an old friend back.
Anonymous –
Great filter, tastes funny the first two times through
Leah P. –
Very happy worn this, wish I would have known about this option years ago. Thank you!
Scott –
Fast shipping, received as expected!!!
Charlie –
Easy to install!
John –
Haven’t tried them yet price and delivery we’re great
Anonymous –
I picked this filter because of its NSF certification. I use it in my travel Berkey.
Anonymous –
water taste and looks sparkling clean
Deborah Bryant –
Quick Delivery and quality filters
Edward H. –
Thank you
Sheila Farmer –
I want to by your products only from British Berkefeld in the future.
Kathleen Troiano –
Very happy to find filters after constantly checking the Berkey website and out of stock messages. Should have a way to go to British Berkey to get replacements
Hj L. –
They’re great! I’ve been trying to find something for my berkey for a while and these are perfect! Water tastes great! I’ll definitely be back:)
Anonymous –
Shipping was not speedy, but I planned ahead.
Anonymous –
Much easier to use than the black filters!
Carrie –
Easy to install and water tastes great!
Micah –
No priming necessary. Instantly better water than my old Black Berkey filters. Easy to install.
Wendy Waters –
Works great!!
Anonymous –
Wonderful product. Easy to use, filters quickly and the water tastes great. And you don’t have to prime it!
Brian S. –
Super fast shipping! Water tastes great! Thank you!
Anonymous –
Excellent service and quality product
Don Cooper –
Great service!