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Thread: FHT radiator actuator fitting probelm

  1. #1
    Automated Home Lurker
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    Jan 2011
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    Default FHT radiator actuator fitting probelm

    i have just got a couple of
    570056 - "Actuator for 570055&617499&750404" (An extra actuator)

    when trying to fit to my TRV the thread on fht is a couple of mm to big to fit.

    I notice the adaptors are all for TRV's with no thread,

    Are my TRV's just a bit smaller than standard valves, or is trhere an adaptop to make these fit.

    has anyone else had any issue fitting them, if it is my TRV's that are not standard i think i may have to replace them

    If i do replace them, is there a standard size i should ask for or should they all be the same.

  2. #2
    Automated Home Jr Member
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    Mar 2010
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    Default

    I have some Honeywell TRVs and they screw on fine; the adaptor that came in the box (I got mine from Conrad) are for Danfoss. I came across this when doing my research which I think is the same as the conrad ones and says there are a couple of common different size threads.

    -Jeff

  3. #3
    Automated Home Lurker
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    Jan 2011
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    Default

    Managed to replace all my TRV's

    Only 4.99 each from Screwfix, actuators now fit with no problem.

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