Forget the above post,,,,I got a bit ahead of myself!
Claire,
My reply was written with my tongue slightly in cheek, so you're response re "nonsense" is a little harsh?
You are right, the leginella bugs do not thrive in cold water. And I know you have to inhale the bugs, and the liklihood of an aerosol sufficient to pose a risk is again low, but not impossible. (I have seen water fountains that create considerable aerosol, not many but some!) And I accept that there is low risk of catching legionella from using them. It is possible that the water supply pipe may rise in temp due to ambient temperature of the room, in this case, a toilet? It is also possible that the water pipes are not lagged, or close to heating pipes which may allow heat transfer. As you are probably aware, legionella bugs do start to proliferate above 20 degrees? Unfortunately neither of us are party to the full picture so cannot carry out a full legionella assessment, we can only assume?
However, water fountains, especially those in toilet areas are considered by (and Chris is quite right) the overly worried parents and other mollycoddled folk, to present a hygiene risk. For this reason, the fountains tend not to be used, and if they are not used then by the guidance in L8, they become little used outlets or deadlegs, and L8 suggests that deadlegs should be removed or minimised where ever possible. So people are removing them as it is a cheaper aoption than flushing on a weekly basis?
So (and placing my tongue firmly back into my cheek), the general concensus, for whatever reason, is that there are better ways, and better sites (ie not in the toilet)that can be used to supply fresh drinking water, and hence the current demise in the good old water fountain!
Hope you have a very Merry Xmas and a Happy New Year
(I removed "tongue in cheek" for the Xmas wishes)
yours respectfully
Holmezy