The concept of filtered drinking water is well understood as a means to remove impurities, but how exactly does the process work? It was in 1826 that Henry Doulton invented the ceramic water filter candle as a way to cleanse the drinking water supply, which at that time came from a river polluted by sewage. Ceramic drinking water filters build on nature’s method of filtering water through layers of porous rock, which removes impurities to leave fresh, clean water.
How do our water filters work?
Taking out the bad and leaving the good
Doulton water filter cartridges are cylinders created by layers of porous material that water passes through before it emerges from the mount. The outer shell of the filter cartridge is ceramic, made from natural piles of earth. It has tiny pores in it measuring less than one micron – 100 times smaller than a hair – which filter contaminants from the water as it passes through.
Within the ceramic matrix, silver is used to inhibit bacterial growth; locking the bacteria in and stopping it regenerating on the ceramic.
An activated carbon inner core provides powerful filtration, absorbing chlorine to improve the taste and smell of the drinking water.
An ion exchange resin is incorporated into particular grades of Doulton water filters to remove heavy metal ions from drinking water, including lead. This process also works to soften the water.
What contaminants are removed from drinking water by ceramic filters
- Pathogenic bacteria such as E. coli, salmonella and cholera
- Waterborne cysts such as cryptosporidium and giardia, which are found in human and animal faeces
- Disinfectants, such as chlorine
- Heavy metals, such as lead
- Rust and foreign particles
Independent laboratory tests have proved that Doulton water filter systems remove 99.99%+ of contaminants added to treat water, such as chlorine and fluoride, as well as heavy metals, pathogenic bacteria, and cysts.