After the purification of PW or HPW, engineering of the customer -specific storage and distribution system takes place, so product water can be delivered to each point of use in the sterile distribution system without recontamination. The entire distribution system is made of 316L stainless steel tubes, which are orbitally welded together with a surface quality from Ra <0.4-0.8μm. The designing of the distribution system requires detailed engineering towards achieving a sterile environment.