The aim of this talk is to create an awareness to nurses and assistants of the importance of quality of final water rinse for endoscope after HLD to prevent recontamination of endoscope. It is important to have a water filtration / water treatment for final water rinse for both AER and manual rinsing will be outlined. Stressing on validation of water quality as per standard and guideline and reason behind for water validation. Calling all unit heads to seriously look into educating all staff on the importance of final rinse water quality after HLD and maintaining the high quality water for final rinse with proper water filtration/water treatment and validation of water quality for final rinse of endoscope after HLD