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When draining system to replace taps should combi boiler be turned off?

Discussion in 'Plumbing and Central Heating' started by Mmcgar, 2 Oct 2019.

  1. Mmcgar

    Mmcgar

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    I need to replace the cold tap in my bathroom sink. Since I can't get the exact replacement tap I'll have to replace the hot aswell.

    Should I turn the combi boiler off when I'm draining the hot tap down? I'm thinking that if I don't then as the water drains, the boiler will be trying to heat water that isn't there and this could be an issue?
     
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  3. ianmcd

    ianmcd

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    just isolate the cold water inlet at the boiler and open the hot tap, boiler will be fine using the CH with the water isolated
     
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