British Berkefeld Ultra Sterasyl Filter Cartridge (Model 8674)

If you are looking for the absolute best-selling gravity water filter replacement cartridge to remove microplastics, bacteria, and toxic forever chemicals from your drinking supply, the Doulton Ultra Sterasyl Filter Cartridge (Model 8674) is the trusted gold standard.

As the official Doulton distributor in New Zealand, we supply these premium, genuine replacement filter elements to health-conscious households throughout NZ and Australia.

Core Benefits

Your benchtop gravity filter can only protect your health if its cartridges are replaced regularly. The Ultra Sterasyl 8674 candle—which directly replaces the older Super Sterasyl model—is engineered specifically for those who want comprehensive protection against modern chemical contaminants but do not require the removal of fluoride. It is perfect for rainwater tanks, rural properties, or municipal areas where fluoride is not added to the water grid.

This cartridge utilises a complex multi-stage filtration profile. The exterior consists of a sub-micron porous ceramic microfilter shell that forms an unyielding physical barrier against pathogens. It traps bacteria and suspended solids on its outer layer while allowing mineral-rich water to pass through. Inside this shell sits a proprietary granular activated carbon block mixed with heavy-metal reduction media.

Investing in timely filter replacements means you never let your own body act as the filter. Keeping fresh cartridges in your system directly supports your liver and kidneys’ natural detoxification. Operating at just a few cents per filtered litre, while eliminating the need for expensive single-use plastic bottled water. An essential investment for clean and sustainable lifestyle practices across Oceania.

System Compatibility

The Ultra Sterasyl candle features a universal 7-inch design with a standard 1/4-inch BSP threaded stem. It installs quickly without tools and is fully compatible with almost every major gravity water system on the market:

• British Berkefeld Stainless Steel Gravity Systems

• Berkey Water Filters

• ProOne and Phoenix Systems

• Newton Units

Important Usage Note: Do not combine Ultra Sterasyl and Ultra Fluoride cartridges together inside the same filter housing. Mixing cartridge types degrades individual filtration efficiency.

Detailed Technical Specifications

• Brand: British Berkefeld / Doulton (Proudly carrying the “Made in Britain” stamp of quality)

• Model Code: Ultra Sterasyl (8674) — Direct replacement for the ATC Super Sterasyl candle

• Materials: Microfiltration Porous Ceramic Shell with a Granular Activated Carbon & Heavy Metal Reduction core

• Dimensions: 177 mm (Height) x 67 mm (Width) x 67 mm (Depth) / 7″ Tall Candle

• Fitting Structure: 1/4″ Diameter BSP Threaded Stem (Includes matching wing nut & rubber washer)

• Flow Rate Capacity: Up to 1.2 litres per hour per individual cartridge under gravity pressure

• Target Lifespan: Up to 6 months of regular use per cartridge

• Certifications: Tested and certified by NSF (NSF/ANSI Standards 42, 53, 372, and 401) and WRAS (Registration 2204074)

Verified Contaminant Performance List

• Microplastics: Certified 99.9% reduction of microplastic particles under NSF/ANSI Standard 401 testing.

• Forever Chemicals (PFAS): Highly efficient reduction of industrial polyfluoroalkyl substances.

• Pathogenic Bacteria & Cysts: 99.99% removal of bacteria like E. coli, Giardia cysts and Cryptosporidium cysts.

• Heavy Metals: Advanced extraction of toxic heavy metals, specifically focusing on lead.

• Disinfectants & Organics: Targets chlorine, chloramines, volatile organic compounds (VOCs), enhanced organics, and trace pharmaceutical residues (such as estrogen).

• Taste & Odour: Eradicates musty tank odours, chemical tastes, and structural sediment while safely retaining all healthy, naturally-occurring essential minerals.

Replacement Schedule

To maintain the filter performance, the manufacturer recommends replacing your filter cartridges in accordance with how many elements you run at one time:

• 1 Cartridge running by itself: Replace every 6 months.

• 2 Cartridges running simultaneously: Replace every 12 months

• 3 Cartridges running simultaneously: Replace every 18 months.

• 4 Cartridges running simultaneously: Replace every 24 months.

Note: If you live in an area with high sediment or cloudy water, the ceramic pore structure may slow down its flow rate early. Simply remove the cartridge, scrub the outer surface under cold running water with the abrasive side of a clean sponge to remove buildup, rinse, and reinstall. Make sure no water enters the stem.

Shipping and Delivery Information

All orders are processed and dispatched directly from our warehouse.

New Zealand Shipping

• Free Shipping: On all orders over $399 (excluding GST).

• Flat Rate Shipping: $9.95 (excluding GST) for orders under $399.

• Carrier: Tracked NZ Post delivery (1 to 8 working days).

Australia Shipping

• Free Shipping: On all orders over NZ$399.

• Flat Rate Shipping: NZ$39.95 for orders under NZ$399.

• Carrier: Tracked international delivery (5 to 10 working days).

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Your purchase is backed by our 30-day money-back guarantee as outlined in our terms and conditions.