RO Water system Qualificaiton / Validation

Dear forum members,

we have RO purification system without return loop and UV filters. can we validate this system (Phase-I (14 days), Phase-II (14 days) and Phase-III (One Year)). Is it acceptable for API bulk drugs manufacturing unit.
please advise how can i validate this water system.

No need
Only 7 days sampling of TDS required as per WHO guidelines.
And for routine once in 3 months sampling required