At the tap or shower outlet, where the water is to be dispensed, filtration and water treatment is commonly applied. This is typically to improve the taste and odour of the water with a carbon cartridge or inline filter.
Some have the requirement for reverse osmosis (RO) quality water or the need to remove specific contaminants such as nitrate or arsenic. In applications where bacteria removal is important, or critical, then hollow fibre media is used to absolutely remove.