DoultonDoulton HIP DUO Under Sink System with Biotect Ultra
Doulton HIP DUO Under Sink System with Biotect Ultra
Doulton
Promising research
British Berkefeld (Doulton)
British Berkefeld Stainless Steel Gravity System + Ultra Sterasyl
Early research
£166.95typical price
Best for: Off-grid homes, boats, camping and people who want a plastic-light, no-plumbing filter
Buy now at Amazon- Stainless steel body, ceramic candles
- NSF/ANSI 42 and 53 certified for cysts and particulates
We may earn a commission if you buy through our links.
Stainless steel body, ceramic candles
- Power
- None
- Capacity
- 1L to 12L options (6L priced)
- Material
- Stainless steel housing
Where we checked it: doulton.com ›
Compare where to buy
We may earn a commission if you buy through our links. How we choose ›
Why we picked it
It is a stainless steel body with ceramic and carbon candles, so very little plastic touches the water, and it needs no plumbing or power. Doulton’s 2025 instructions show the Ultra Sterasyl candles are NSF-certified to NSF/ANSI 42 and 53 for cysts, particulates and turbidity.
Best for
Off-grid homes, boats, camping and people who want a plastic-light, no-plumbing filter
Not for
Anyone buying it mainly to reduce lead or PFAS from mains water
The details that matter.
- • Stainless steel body, ceramic candles
- • NSF/ANSI 42 and 53 certified for cysts and particulates
- • No certified lead or PFAS claim
- • No plumbing or power needed
Specifications
- Power
- None
- Capacity
- 1L to 12L options (6L priced)
- Material
- Stainless steel housing
- Filter media
- Ceramic shell with silver and activated carbon core (Ultra Sterasyl)
- Cartridge life
- 1,500 litres per candle, about 6 months
Certifications
How strong is the research? What our grades mean ›
- Strong research
- Independent certification or lab data for the specific claim.
- Promising research
- The material is well supported, but there is no product-level testing.
- Early research
- Little independent research.
- Mixed research
- Research findings disagree.
- £
- Under £20
- ££
- £20 to £79
- £££
- £80+
