|
|
Post by ecoplum on Jan 23, 2022 13:11:34 GMT
I am curious if anyone knows of a case of legionella in a domestic property?
In my old house I had the unvented cylinder set at 55C (which I am led to believe is enough to keep legionella at bay) however in reality have no need for water hotter than 50C. Surely if the cylinder is being used significantly on a daily basis i.e bath fill or long shower, there will be a massive inrush of fresh cold water which would replace pretty much the entire contents of the cylinder. Could I set it to 50C and not worry or is this asking for trouble?
Cheers!
|
|
|
|
Post by rocketmanbkk on Jan 23, 2022 14:12:15 GMT
I am curious if anyone knows of a case of legionella in a domestic property?
In my old house I had the unvented cylinder set at 55C (which I am led to believe is enough to keep legionella at bay) however in reality have no need for water hotter than 50C. Surely if the cylinder is being used significantly on a daily basis i.e bath fill or long shower, there will be a massive inrush of fresh cold water which would replace pretty much the entire contents of the cylinder. Could I set it to 50C and not worry or is this asking for trouble?
Cheers!
Never heard of it domestically & using the water will flush it through as you say. 50° isn’t that hot though. |
|
|
|
Post by dickpuller on Jan 23, 2022 18:59:13 GMT
Legionella like many bacteria is present in all water, it’s certain temperatures that makes it multiply Breeding Grounds for it are Shower Heads & HW Pipe dead legs.
Cylinders from my recollection only need heated above 60degrees C every week or so. However, it’s a nasty wee bastard that attacks the body’s respiratory system. So I’d be cautious!!!
|
|
|
|
Post by tomplum on Jan 23, 2022 19:53:58 GMT
As Dick says, it needs somewhere to breed and incubate like a dead leg, Also the hot water comes from the TOP of the cylinder and the stat is halfway to 2 thirds up, so setting the stat at 60 ( which kills the bug) the top of the cylinder will be hotter because hot water rises, never the less, Do not drink the hot water,  |
|
|
|
Post by crowsfoot on Jan 23, 2022 20:31:41 GMT
It's most prevalent between 20-40 degrees centigrade.
Hence, a large non moving cold water storage tank on a hot summers day would be the ideal breeding ground for the legionella bacteria to multiply to dangerous levels.
It's still safe to drink it though, to catch the legionella disease from it you'd have to first get it into a mist and then inhale the vapour into your lungs.
Commercial companies have to be seen to have implemented a plan of protection for their customers/employees just in case anyone ever says "hey, I've caught legionella from your company last week"!
Even if you had caught legionella you still couldn't claim very easily against a company if they have a legionella protection plan in place, however, if they haven't then they'd be in deep shit with the health and safety executive.
NB These notices that they're now having to put on public toilets with the instruction to only flush it when the seat is down just leave me speechless.
However, they could save your company a large compensation legionella case award.
That's what it's really all about and I'd say that it doesn't really apply in a modern single domestic setting at all.
|
|
