New plumbing in residential and commercial buildings, pipelines and distribution systems should be sanitized to kill bacteria when first put on line, or if repairs or service has been performed. Pipeline disinfection immediately after water tank cleaning is one of the most popular methods for sanitizing pipelines by removing bacteria and bio-films. Bio-films are layers of bacteria that attach to the interior walls of water distribution pipes and to one another -- most heavily around corroded surfaces on pipes. The bacterial community traps nutrients, microbes, and waterborne pathogens to eventually form an almost impenetrable material.Almost immediately after attaching itself to pipeline walls, the organism begins building upon itself, adding layer upon layer, forming a plaque-like coating.