[stuart mc]

right listen, dave is right, there is nothing we do that will cause legionaries, it is in almost every source of water and even if you drink it will not harm you, it has to be a vapour before that happens, we do not cause a vapour, small streams through jets or spray through fan jets but vapour no, yes the guys with tanks circulating warm water are encouraging growth but it is still harmless, unless you send a few thousand gallons up a cooling tower or whatever

[Splash 4 Cash]

The previous thread got me think ,its the isopropanol in the screen wash that would kill germs SO ONE COULD JUST ADD ISO INTO YOUR WATER TANK AND KILL ANY GERMS THERE MIGHT BE.IT WOULD BE THE EASIEST SOLUTION TO THE PROBLEM IF IT WORRIED YOU.

[Window Washers]

right listen, dave is right, there is nothing we do that will cause legionaries, it is in almost every source of water and even if you drink it will not harm you, it has to be a vapour before that happens, we do not cause a vapour, small streams through jets or spray through fan jets but vapour no, yes the guys with tanks circulating warm water are encouraging growth but it is still harmless, unless you send a few thousand gallons up a cooling tower or whatever

you may want to go and read up on it a little more Stuart

[Dave Willis]

So how can you get the disease from a shower? My shower doesn't vaporise the water like my fan jets do. The trouble on this forum is that everyone is an expert.

In reality someone needs to talk to a proper 'expert' and remove the guesswork.

[Perfect Windows]

OK, done some research.


This applies only to my situation, so yours may be different.

Filled tank in van on Friday afternoon as normal.

Filled IBC (black, in 30-90% shade depending on sun position) in garden on Friday as normal.

Weather: Yesterday, bright but not sunny.  Today, bright and sunny until 2, bright but overcast since.

Sun hits van from about 9am.

Measurements at 17:40 today.

Temperature of water in IBC 17.6deg
Temperature of water in van 23.4deg

From: http://www.hse.gov.uk/healthservices/legionella.htm "Legionella bacteria is commonly found in water. The bacteria multiply where temperatures are between 20-45°C and nutrients are available"

That puts it in the danger region for temperature.  Whether nutrients are available is a moot point - my water's currently TDS003 - is that enough?.  A warm weekend and I'm prepared to bet that the temperature of the water in the van would have been much higher.



I'm putting this into my risk assessment for the summer months.  By all means tell me I'm wrong and that you don't need to.

Vin

[Perfect Windows]

right listen, dave is right, there is nothing we do that will cause legionaries, it is in almost every source of water and even if you drink it will not harm you, it has to be a vapour before that happens, we do not cause a vapour, small streams through jets or spray through fan jets but vapour no, yes the guys with tanks circulating warm water are encouraging growth but it is still harmless, unless you send a few thousand gallons up a cooling tower or whatever

Stuart,

I'm not sure that's quite accurate.  For the transmission of legionnaire's disease the water doesn't have to be a vapour, it has to be an aerosol (suspension of droplets in a gas).  There is a significant difference.  You're right, we do not create a vapour, but we very definitely do create an aerosol.

Look up at an upstairs window tomorrow towards the sun and you'll see spray everywhere, whether you're using fans or pencils.  That suspension of water droplets in air is an aerosol.

Vin

[Dave66]

well nobodys caught it yet using wfp so we're fine. 

[GB Window Cleaning]

im still deciding if its worth me doing anything about this or not to be honest

[AuRavelling79]

So how can you get the disease from a shower? My shower doesn't vaporise the water like my fan jets do. The trouble on this forum is that everyone is an expert.

In reality someone needs to talk to a proper 'expert' and remove the guesswork.

1. Unclean shower head
2. Steam is water vapour - a "hot" shower produces steam/vapour - just like a water cooling tower

I think to all practical purposes this is a load of "who shot John" ...

[Perfect Windows]

Actually, I've changed my mind,

My advice now is "ignore it and it'll go away".

Vin

[AuRavelling79]

Actually, I've changed my mind,

My advice now is "ignore it and it'll go away".

Vin

How about "it was never here"?

[Perfect Windows]

Actually, I've changed my mind,

My advice now is "ignore it and it'll go away".

Vin

How about "it was never here"?

Read through the thread.

Someone asked a question about legionnaire's.

Since then we've been told that:

It can't be contracted from washing windows down as it needs to be airborne
It's an urban myth
Water in tanks remains at tap temperature
Water in tanks is freezing
We are no different from people with a water butt in their back garden
We do not cause a vapour
We do not cause an aerosol
Legionnaires is cause by unclean shower heads.


All of which smack to me of putting your head under the bedclothes to avoid the monsters.


Factually, the water in my tanks (measured, not opinion, see post above) hits the danger zone.  Factually, I produce an aerosol of water from that tank.  Factually, an aerosol of water with legionella in it can infect people 500m away (some reports claim 6km but that appears uncertain).


I know you're unpersuadable and that any risk that hasn't already occurred never can occur, so ridicule it and ignore it and it'll go away.

Vin

[GB Window Cleaning]

i know what your saying vin...

ive sort of come to the conclusion (right or wrong) that the water in my van tank (i dont have an ibc) is not stored long enough to pruduce risky amount of leggionella!?

also i make a oint now of not keeping water stored for any amount of time e.g... i fill up OVER night and use the next day! (mostly)

thanks vin

george

[Dave Willis]

I think it's in the same category as strapping tanks in vans.
It's a risk, probably a small one, but a potentially lethal one.
No one has died from it yet wfp and no-one has a report of being squashed by their tank either.

One day though, it will probably happen somewhere.

[dazmond]

if your working most days then your water is constantly being used and replenished so i dont think we have anything to worry about.i use cold water so no problems although its VERY LUKE WARM on hot sunny days!!