Doulton Sterasyl 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

Doulton Sterasyl is a highly efficient ceramic micro filter which provides genuine sub micron filtration to your drinking water.

In addition to fine particulate matter, bacteria, cysts and turbidity are removed to a high level of efficiency. The incorporation of silver locked within the ceramic structure inhibits the growth of bacteria and gives each cartridge an enhanced self sterilising property.

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.


The Doulton Sterasyl cartridge is available in 3 sizes:

  • Slimline 2” x 9 ¾”
  • Imperial 2 ¾” x 9 ¾”*
  • Sovereign 4 ½” x 9 ¾”*

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