Changing trv without drain down

Discussion in 'Plumbing and Central Heating' started by tomsim, 4 Feb 2021.

  1. tomsim

    tomsim

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    Is it possible to change a trv on an upstairs radiator. Without draining the system. Without causing a flood.
     
  2. muggles

    muggles

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    Usually yes
     
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  4. tomsim

    tomsim

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    Don't open the bleed valve on the rad. Shut the locksheild off. Take the pressure out of the system. Then swap the valve? It should airlock?
     
  5. Mottie

    Mottie

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    Surely only on a sealed system, not open vented?
     
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