Doulton Ultra Sterasyl Candle

Clean, beautifully filtered water starts with a filter you can trust.

Our replacement filter candle is designed to reduce a wide range of unwanted contaminants while preserving the natural minerals your body needs.

Removal percentage Contaminants:

99.99%: Cyst Reduction Cryptosporidium Giardia

99.99%: Microplastics

99.99% Rust, Algae, Sediment, Suspended Solids

99.38%: PFAS

99.99% Harmful Bacteria: E. Coli, Cholera, Shigella, Salmonella, Klebsiella

99.39%: Lead

100%: Guinea Worms

>97%: Turbitdity

95%: Chlorine

>99.99%: Absolute Filtration 0.9 Micron

>99.9%: For Particles Between 0.5 and 0.8 Micron

How the filter works

Our ceramic filter element uses a four-stage filtration process to reduce a wide range of unwanted contaminants while helping preserve the natural minerals found in water.

Stage 1: Ceramic microfiltration

The outer ceramic layer captures bacteria, cysts, sediment, and other fine particles through sub-micron filtration.

Stage 2: Antibacterial protection

Silver ions embedded within the ceramic help inhibit the growth of microorganisms on the filter itself, supporting cleaner and longer-lasting performance.

Stage 3: Activated carbon filtration

A core of granular activated carbon reduces chlorine and a variety of organic compounds, helping improve the taste and smell of your drinking water.

Stage 4: Heavy metal & PFAS reduction

A specialised filtration medium helps reduce contaminants such as lead and PFAS from your water.

• Filters particles down to 0.5 microns
• Up to approximately 2000 litres filtration capacity per candle
• Gravity-fed filtration (no electricity required)
• Compatible with claii water filters
• Long-lasting ceramic filtration technology

To maintain optimal filtration performance, we recommend replacing your filter candle based on your household's water usage.

4 Months
Families & heavy daily use. Ideal for households that rely on their filter throughout the day for drinking, cooking, tea, coffee, and everyday rituals.

6 Months
Couples/Small Families & balanced daily use. Our most popular choice for smaller households that enjoy filtered water daily while maintaining a steady, balanced rhythm of use.

8 Months
Individuals & lighter use. Perfect for slower-paced households or those who primarily use filtered water for drinking rather than all kitchen needs.

Please note that filter lifespan may vary depending on water quality, hardness levels, and daily consumption. If you notice a significant decrease in flow rate or filtration performance, it may be time to replace your candle sooner.

For added convenience, subscribe and save 10% on every replacement candle. You can pause, skip, or cancel your subscription at any time.

We believe filtration claims should be supported by evidence.

View the full laboratory test reports below to learn more about the filtration performance of our filter candles.

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DOWNLOAD TEST REPORTS

Doulton Ultra Sterasyl PFAS Reduction

Doulton Ultra Sterasyl Pharmaceutical Reduction

Doulton Ultra Sterasyl Heavy Metals Reduction

Doulton Ultra Sterasyl Chemical Reduction

Doulton Ultra Sterasyl Pesticides Reduction

Doulton Ultra Sterasyl NSF Certificate