Greg and Dan welcome Kevin Freidt, Caleffi Director Product Management & Technical Support (a..k.a. The Dr. of Disinfection) to the microphone.  They explore the fascinating topic of Legionella bacteria and its impact in domestic hot water systems.  Kevin starts with "bug basics":  where does the bacteria originate, when is it dangerous, what causes it to proliferate and how is it contained?  He discusses dead legs in potable water piping systems and explains how water becomes "old."  Not familiar with the ASHRAE 188 Standard?  Take note!  It's an important reference guide.  The Ask Caleffi Team completes this podcast with an interesting discussion on how we can ensure safety in our water systems. Want to hear YOUR QUESTION on Ask Caleffi?  Take this quick 4 question survey for your chance to hear your question in a future episode. Survey: https://forms.gle/fRfnU8Px3B1Lq7K69 Thanks for the sound effects! www.freesfx.co.uk