The use of purified water (PW) and water for injection (WFI) in the production processes is very common in the pharmaceutical industry. These systems are represented by two main stages: water production and its storage and distribution. The assembly consisting of a storage tank and a distribution loop is called a purified water (PW) loop or a water for injection (WFI) loop.
The difference between the purified water (PW) and water for injection (WFI) is mainly based on their physical, chemical and microbiological properties.
