Coldstream Ceramic Water Filter Max Purifier – For Mains Pressure Systems (CF521W)


In stock
Free UK Standard Delivery

Max replacement Purifier, 2.9″, 9.75″, Max, OBE, CB, T (Suitable for housings designed for filters of 10″)



This filter will NOT fit our Stainless Steel Countertop or Undercounter systems.  It is compatible with our blue plastic undercounter system.

The Coldstream MAX ceramic water purifier provides the ultimate in protection against water pollutants, waterborne viruses and delivers great tasting water too – it is made up of three key components.

  1. The carbon inner core protects against chemical contamination, including pesticides and herbicides.
  2. Surrounding this is our unique ceramic outer layer giving maximum anti-bacterial protection and the removal of particles and microplastics.
  3. Finally, we add a duck egg blue ceramic outer layer containing antimicrobial properties, which helps to eradicate any waterborne viruses, providing maximum protection against all water pollutants.

Please see our performance data sheets for details of all the contaminants that are removed including PFAS.


  • For great tasting, safe drinking water
  • Healthy salts and electrolytes stay in the water
  • Maximum protection against water pollutants
  • Filter replacement indicator
  • No power required
  • Removed PFAS

Additional information

Weight 0.72 kg
Dimensions 29.5 × 8 × 8 cm

Coldstream Filters and Purifiers Remove






Heavy Metals

Pesticides & Herbicides


but essential salts and electrolytes are maintained

Providing Clean, Safe Drinking Water

We make the very highest standard of drinking water filtration systems and purifiers, capable of providing the cleanest, safest drinking water straight from the tap.

Coldstream filters and purifiers are made at our state-of-the-art UK manufacturing facility using our unique ceramic injection moulding technology. Our business is environmentally powered by energy generated from wind power and solar panels.

We remove pollution, we don’t create it.