Doulton Ultracarb Imperial Ceramic Filter Cartridge


Doulton ceramic water filters have been continually manufactured for over 170 years. The first water filters were manufactured in the early 1800’s at Doulton & Co.’s Lambeth works on the banks of the River Thames, London.

Nowadays, Doulton offers a wide range of drinking filter systems, alongside their accredited various grades of candles and cartridges.


Filtration Process

3-Stage filtration process

Stage 1

Doulton Sterasyl ceramic provides genuine sub micron filtration. The cartridge reduced fine particulate matter, bacteria, cysts and turbidity. The incorporation of silver locked within the ceramic structure gives enhanced self sterilising properties.

Stage 2

An inner core of activated carbon block removes chlorine and organic compounds.

Stage 3

Ion exchange resin reduces Lead and other heavy metals.

Filtration efficiency

Absolute filtration rating>99.99%0.9 micron
Nominal filtration rating>99.99%0.5 – 0.8 micron
% Bacteria removalE-Coli, Vibrio cholera
Shigella, Salmonella Typhi, Klebiella Terrigena
% Cyst removal5 Cryptosporidium, Giardia>99.999%

Features & Benefits

  • Compatible within standard 10” or 20” filters.
  • Filtration efficiency >99.99% at 0.9 micron.
  • Filtration efficiency >99.99% at 0.5 to 0.8 micron.
  • Highly efficient bacteriological filtration.
  • Cryptosporidium removal efficiency of >99.999% (tested live).
  • Ideal for post filtration.
  • High levels of chlorine and organics removed.
  • Lead and other heavy metals reduced.


The Doulton Ultracarb cartridge is available in the following size:

  • Imperial 2 ¾” x 9 ¾”

The Imperial cartridge can be supplied with an additional adaptor cartridge in order that they may fit appropriately within 20” (whole house/high flow) housings/filter systems.