Why are bacteria a problem in closed water systems?
A. There are many different types of bacteria many of which are harmless. Some bacteria can however cause problems if they get into the wrong place. In closed systems bacteria which cause biofilm are problematic since this biofilm can reduce the efficacy of flushing (leaving debris within pipework), affect thermal transfer, create conditions for under deposit corrosion and, in association with other debris, cause blockages or restrictions in control and regulating valves as well as strainers. Other undesirable bacteria are associated with microbial corrosion or loss of corrosion inhibitor (in the case of nitrite based inhibitors).
