Newbie Question about Capiliary activated TRV's

Discussion in 'Plumbers' Talk' started by Chris Morewood, Mar 14, 2019.

  1. Chris Morewood

    Chris Morewood New Member

    This is my first post here. After surfing the web for hours, I decided to ask for advice here.
    I'm in the prosess of installing wet underfloor heating in our new porch and would like another small loop to run outside under the 1.5sqm step to provide frost/ice protection, as the outside door opens outwards.
    I'm looking for a trv/15 or 16mm type valve with a capilliary, calibrated down to 0 or 1 degree C.
    With the capiliary sensor mounted on the outside of the porch the valve should open at 1 or 2 degrees C to allow the step to warm and prevent ice formation.
    Surely there must be something out there but all the TRV's I can see are activated at 5 or 6C which is too high?
    Can anyone point me in the right direction please?
  2. gas monkey

    gas monkey Well-Known Member

    water starts to freeze at 4 deg thats why
  3. JustPhil

    JustPhil Active Member

    Just keep the heating cranked mate and within the next year or so climate change should have taken care of that pesky step.

    Edit: sorry, I’m being an ****, couldn’t resist.
    Last edited: Mar 14, 2019

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