Hot and cold water supply pipes under floor, slightly OT

[Flyfisher]

As above, I've always assumed that legionella is present more or less everywhere but in low and therefore harmless concentrations (like most bugs really). Although they will multiply in warm water, if weekly pasteurisation is deemed adequate in AMc's system then I would guess that a pipeful should be safe enough because the water would typically be drawn off and replaced at least daily, so dangerous concentrations would be unable to build up.

This also makes sense in the context of Penners' observation about cold taps frequently running warm for a short while because of pipework running in parallel, which is surely commonplace throughout the land and quite independent of whether or not such pipes should be buried in a concrete floor, as the OP asked.

For those of a worrying disposition perhaps it would be helpful to run the taps for a short while after returning home from holiday but otherwise I wouldn't lose any sleep over it - but then I'm the sort of person who fills his bedside glass of water from the bathroom tap fed from the attic tank . . .

 

[LadyArowana]

This also makes sense in the context of Penners' observation about cold taps frequently running warm for a short while because of pipework running in parallel, which is surely commonplace throughout the land and quite independent of whether or not such pipes should be buried in a concrete floor, as the OP asked.
. . .

If warm cold water was a problem then the population of Singapore would be dropping like flies :lol: I have never tested what temp it comes out of the tap, but I certainly notice a big difference to London. It doesn't have a horrible taste either, which is the case in some places where it is more heavily treated. Of more concern is keeping aircon units clean and not allowing a build up of stagnant water where mossies could breed and carry dengue.

In deference to Joce I think anyone who has the luxury of constant running water rather than a somewhat sulky well should be counting their blessings!

 

[Penners]

I'm the sort of person who fills his bedside glass of water from the bathroom tap fed from the attic tank . . .

...the attic tank being the place where, in one of our houses some years ago, I once found a dead pigeon floating in the water! :x

Fortunately I made this discovery when we were moving in, while putting some boxes up in the attic. Needless to say, the tank was emptied, disinfected and then provided with a lid!

 

[AMc]

I'm the sort of person who fills his bedside glass of water from the bathroom tap fed from the attic tank . . .

...the attic tank being the place where, in one of our houses some years ago, I once found a dead pigeon floating in the water! :x

That which doesn't kill me makes me stronger

 

[Flyfisher]

Exactly. Got to give the immune system something to practice on.

I've never come across a pigeon in a water tank before, though I did once find a live bat in a previous house, clinging onto the ball-valve. Poor thing.

 

[Penners]

Poor thing?? :shock:

It was deliberately trying to overfill your header tank, and you still call it "poor thing"?!

What a forgiving chap you are!

 

[Flyfisher]

'Tis true that I only investigated because the overflow pipe was dripping so perhaps that was its motive, but the poor thing paid the price because although it was alive when I rescued it and placed it in a warm place, it was dead the following morning.

At least it didn't die in the tank and contribute to my daily bacterial intake.

 

[AMc]

'Tis true that I only investigated because the overflow pipe was dripping so perhaps that was its motive, but the poor thing paid the price because although it was alive when I rescued it and placed it in a warm place, it was dead the following morning.

At least it didn't die in the tank and contribute to my daily bacterial intake.

Rumours that bats carry rabies are thankfully greatly exaggerated.

Once they have got into the wrong place I've found bats don't last long. This summer one got into the house and secreted itself in the guest bathroom. I only found it when it had died and dropped into the tub the next day . L
ater in the year I found one hanging onto the wall outside the backdoor. I rang the bat protection people but by the time they had returned my call it had expired.

I did find this information about what I should do but by the time I'd got the box it was already too late.
http://www.bats.org.uk/pages/containing_a_bat.html

 

[Onetap]

Anybody heard of this new rule, or is our contractor just blowing smoke to avoid the work involved?

A bit late and I haven't read the whole thread, but I think he's thinking of the Water Regulations, 1999.
G7.3 A concealed pipe may be installed in a pipe sleeve or duct located under or within a solid floor provide that the pipe can be readily removed and replaced.

PEX plastic in a pipe sleeve would be suitable. The pipe manufacturers supply a compatile corrugated sleeve.