Water purification system validation

Hello, we have water purification system for producing WFI.It includs RO and Distillation.Can we validate it separately or we have to do it together.

RO can produce “purified water” and same water can be used for production of WFI through distillation. As the specifications (of output water from each unit) are different, better it should be qualified individually.


Dear Arzakan,
For complete water system validation,if we consider treatment and distributation is better to keep separate qualification documents.
For validation purpose club both system and PQ should be elabrated for all the phase of validation.

During phase of validation we need to consider each point.so club both system.it will easy to analise the system throughly.