Doulton Duo Under-sink Filter Kit with Ultracarb and Cleansoft filters, tap and fittings



Stage 1 – CleanSoft
Protect against the damaging effects of hard water by using the Doulton® CleanSoft limescale reduction cartridge in the first chamber of the DUO drinking water filter. Reduces limescale build up in kettles. Reduces temporary hardness in drinking water. Prevents an unpleasant film forming on the surface of tea. CleanSoft cartridge life – 3 months typical usage before cartridge replacement is required

Stage 2 – Ultracarb
Multistage filtration in one filter cartridge:
Stage I – Outer Shell-Micro Filtration
Stage II – Anti-Bacterial formula within the ceramic matrix inhibits microbial growth
Stage III – Activated carbon in the Ultracarb candle takes out chlorine and organics improving taste and odour
Stage IV – Ultracarb also contains heavy metal removal media, which takes out toxic lead Ultracarb filter candle life – 6 months* before replacement of the ceramic filter required. *Cartridge and filter candle life may vary depending upon your local water conditions.

Testing & Certification:

NSF and WRAS testing and certification – to standard NSF/ANSI 42 Drinking Water Treatment Units – Aesthetic Effects and NSF/ANSI 53 Drinking Water Treatment Units – Health Effects. Full testing and certification information is available via the following link: Click here Manufacturer is audited by the British Standards Institute (BSI) and achieved BS EN ISO 9001 quality standards.


1 x Doulton Duo Housing

1 x Doulton Ultracarb Ceramic Filter

1 x Doulton Cleansoft Ceramic Filter

1 x Chrome tap

1 x 3 metres of DMFit Tubing

1 x Finerfilters auto shut off valve (ASV3)

1 x 7 1/16 x ¼” tap adapter

Faucet / Tap Specifications
Connection: 7/16″ Thread (We supply a 7/16″ UNS x 1/4″ Push Fit Fitting)

Tap Stem: The taps have a 70mm stem and although designed to fit onto your sink, should fit through most modern-day worktop and kitchen sink tops.

Bore Size: The hole you will be required to drill through your work-surface should be between 11mm – 16mm

Minimum Operating Pressure: 7.5 psi / 0.5 Bar

Maximum Operating Pressure: 120 psi / 8.5 Bar


The Doulton DUO Drinking Water Filter from Doulton brings you bottled quality water on tap in your own home.

DUO fits neatly under the sink in your kitchen, supplying filtered water through the drinking water tap included in the kit.

Doulton water filters have been manufactured in the UK for more than 185 years. It is a well tested and trusted brand.

Doulton Duo module with Cleansoft & Ultracarb ceramic filters, tap, tubing and fittings.

Tap Pressure:

MIN – 0.5 Bar

MAX – 8.5 Bar

Additional information

Weight 2.7 kg
Contaminent Removed

Bacteria, Chlorine, Heavy Metals, Limescale, Odour and Taste, Sediment, THMs / VOCs

Filter or Media Type

Ceramic Filters


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