This is the process of using divers with contaminated diving equipment to remove sludge and debris from within the tower basin.

Reasons for cleaning:

-  Experiencing fouling of exchangers.
-  Reduce induction of chemicals.
-  Removal of accumulated sludge which displaces critical water volume caused by pump cavitation.

Benefits:

-  Not interrupting cooling tower operations
-  Schedule cleaning during low demand periods, not during hectic outage schedules
-  Reducing overtime charges
-  Divers can completely clean basin unlike other me­chanical online cleaning systems