Hot water tap problem

[gud98]

I have an Ariston combi boiler. If I want to change a washer on a hot water tap is it sufficient just to turn the mains stopcock off under the sink or do I also need to switch the boiler off & the domestic cold water inlet valve to the boiler before I run the hot water tap dry?

Thanks for your help

 

[Breesey]

Is there not a shut off valve under the sink for the tap?

 

[gud98]

No there isn't one

 

[Breesey]

Close mains and switch boiler off then.

Fit a maint valve on the tap while you're at it.

 

[gas4you]

You should have an isolating tap on the cold supply on the boiler. This will turn off all hot taps but leave the cold ones working.

 

[gud98]

Thanks. I presume this is the one called "the domestic cold water inlet valve" in the boiler manual?

 

[gas4you]

Yep