Resident Thermodynamics / Electronics specialist
Legionella needs to have water circa blood temperature, however it can thrive from 20 to 45°C where nutrients are present.When laying in bed the other day thinking about you, I was curious...
These tanks, the water is static at times I guess unless you pump continuously with a return. How warm is the water in there, any issues with legionella or other such. Maybe that is more of a concern for unvented hot water that is used for showers etc I have no idea. Do you add any kind of water purification tablets if using for drinking water? or do you drink bottled water. I know you probably boil the water most of the time or you're drinking grape juice.
Below 20°C it doesn't grow and above 45°C it slows down. It can be fatal in vulnerable people, exactly the same group as COVID, its a type of pneumonia
Typically above ground storage water needs to be treated if the stored water gets to this temperature.
You shouldn't be drinking hot water from your tank and any systems with stored water should increase the temperature of the water to above 70°C for at least 60 minutes every week. Different authorities adjust these numbers.
It's the main reasons circulating hot water in big buildings is very hot, then blended at each tap.
Our water cooled roof towers are subject to many legal controls for good reason.
Bird shit and dust make great food for this.