Well I hear ya, but it is kinda hard after the fact to know what we should or shouldn't have done. I do think you are correct on the plumbing pipes . We are supposed to keep our water at 130 on the hot water heater and drain the hot water yearly. It collects all kind of bacteria I was told.

Do you remember when they recalled Pine Sol and Frabalose (spelling) that purple cleaner? Both had Pseudomonas in them and were recalled. Tell me how in the world does a cleaning product contain a bacteria?