One of the products of the pharmaceutical industry is the production of various waters for injection or research, such as WFI water (used for injection), PW water (pure water) and HPW water (ultra-pure). These waters must have high standards of treatment.All parameters that need to be evaluated and controlled in the water used for the pharmaceutical industry are determined by the USP standard. The most important of these parameters are pH, toxin content, number of bacteria, temperature and electrical conductivity. The water entering the pharmaceutical industry must be treated.

In the pharmaceutical industry, the reverse osmosis method is usually used for water treatment, but due to the high sensitivity after reverse osmosis treatment, resin treatment is also used to modify and remove the remaining ions completely. In areas where water hardness is high, before entering the reverse osmosis treatment system, it is necessary to first purify the water using hardening resin and then enter the treatment by reverse osmosis method.