Turning off the water to change a upstairs mixer tap

[David Sarbutts]

Hi, I need to change a mixer tap in my bathroom and would like to know if the 2 taps underneath the combo boiler if turned off, will isolate the hot and cold water or do I need to turn the water off at the mains. Photo attached. Any advice will be appreciated. Thanks

 

[Harry Bloomfield]

Nope, that is the heating system fill loop. You will need to turn off at the stop tap and drain both hot and cold water down, probably at you kitchen sink, with that mixer turned on.

 

[just pumps]

Is there no isolation valves under the existing tap.

 

[David Sarbutts]

No, there are no isolation valves under the tap. If I turn the water off at the mains will the boiler need to be switched off as well?

 

[David Sarbutts]

Will turning off the mains automatically switch off the boiler and if so when the water is turned on again will the boiler start to work normal?

 

[Deleted member 267285]

No it’s doesn’t turn the boiler off, if it’s setup as a combi (which it appears to be), then turning off the mains will stop the flow of cold and hot water, once you’ve finished, turning back on the water will start the flow again until taps are turned off. You needn’t worry about the boiler.

 

[David Sarbutts]

Thank you for all your help and informative replies.
Happy days Dave

 

[just pumps]

No, there are no isolation valves under the tap.

Now is a good time to fit two then

 

[Deleted member 267285]

Now is a good time to fit two then

Full bore might I add

 

[David Sarbutts]

Will do