red hot water from bathroom tap

[atm84]

Any thoughts to why almost boiling water is coming from the taps? Faulty stat on the hot water cylinder?

 

[snowhead]

If it's an older gravity circulation hot water circuit with pumped heating there won't be a tank stat.

The only way to control the tank temperature is with the boiler stat.

Regarding the temperature at the tap in any system, be it with or without tank stat, hot water is normally stored at 60c.
You wouldn't be able to put your hand under the hot tap without being scalded.

 

[Hawkmoon]

If its even older there won't even be a tank, there will be a maid heating the water up on a wood fire and pouring it directly into a metal bathtub - temp sensing done by elbow

 

[ian.settle1]

If it's an older gravity circulation hot water circuit with pumped heating there won't be a tank stat.

The only way to control the tank temperature is with the boiler stat.

Regarding the temperature at the tap, in any system be it with or without tank stat, hot water is normally stored at 60c you wouldn't be able to put your hand under the hot tap without being scalded.

If it is gravity feed system the central heating stat will call for heat and the pump and valve will open, central heating doesn't call for heat , the pump will stop and valve closes. But if the boiler stat operates then the boiler will fire and water will go round the hot water system still causing water to heat up.

 

[snowhead]

But if the boiler stat operates then the boiler will fire and water will go round the hot water system still causing water to heat up.

Only to the temperature the boiler stat is set to.

 

[Engineer54]

Whilst I appreciate your comments Engineer, if you read my previous post I said that there is an immersion element with stat that is not connected. From what I have been told the water is being heated by the boiler when the time clock calls for it.

Should there be some sort of stat in the boiler which controls the hot water?

OK, ...me not reading through properly again then... lol!!

 

[MDJ]

Whilst I appreciate your comments Engineer, if you read my previous post I said that there is an immersion element with stat that is not connected. From what I have been told the water is being heated by the boiler when the time clock calls for it.

Should there be some sort of stat in the boiler which controls the hot water?

yes should be a limit stat there somewhere to control how hot the boiler can heat the water, have you had a good look at it?

 

[ian.settle1]

Only to the temperature the boiler stat is set to.

Correct but at this time off year with central heating on it will be quite high

 

[Geordie Spark]

Have you actually measured the temperature of this water????

As has been said earlier the temperature for stored water is 60 degrees C which is too hot to put your hand under.

If this water is at 60 C, You could be assuming that it's wrong when in fact it may not be and you're in a wild chicken and egg situation.

 

[shanky887614]

Have you actually measured the temperature of this water????

As has been said earlier the temperature for stored water is 60 degrees C which is too hot to put your hand under.

If this water is at 60 C, You could be assuming that it's wrong when in fact it may not be and you're in a wild chicken and egg situation.

I think op is getting confused because they put a mix value on yhe hot water now adays so it will never get anyware near 60 from the hot tap

 

[Geordie Spark]

I think op is getting confused because they put a mix value on yhe hot water now adays so it will never get anyware near 60 from the hot tap

Oh .. Ok, thank you.

I never had much to do with stored systems other than ripping them out to replace them with Combis so I'm a bit in the dark.

 

[shanky887614]

Oh .. Ok, thank you.

I never had much to do with stored systems other than ripping them out to replace them with Combis so I'm a bit in the dark.

On new installations I mean, part of regs now that they have to fit on new installs

Much like bonding/rcd etc

 

[Geordie Spark]

On new installations I mean, part of regs now that they have to fit on new installs

Much like bonding/rcd etc

Yes, I understand.

That's why I have never seen them fitted with a mix valve and why the water was always too bloody hot at the tap!!!

Still I suppose that's better than the alternative of the Foreign Legion and it's troop of camels swilling around inside the tank

 

[Badged01]

All this technical stuff, knowledge and competency you need to have to be a plumber and sort out water systems has made me realise how much simpler it is to do electrics ..... we are simple souls in comparison to the god like plumber!

 

[shanky887614]

All this technical stuff, knowledge and competency you need to have to be a plumber and sort out water systems has made me realise how much simpler it is to do electrics ..... we are simple souls in comparison to the god like plumber!

XD we work to a couple mm they work to a couple inches

 

[Badged01]

XD we work to a couple mm they work to a couple inches

Im sure most female customers would prefer a man who gives a couple of inches rather than a couple of mm