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Thread: Valve not shutting properly

  1. #1
    Automated Home Jr Member
    Join Date
    Nov 2018
    Posts
    13

    Default Valve not shutting properly

    Hi, I have one radiator out of 12 in my evohome system that doesn't seem to be closing so the room is overshooting. It's one of these which I'm struggling to identify:

    https://photos.app.goo.gl/Jtumb2btViL8Ri4UA

    I've changed the Hr92 to Stroke 1 mode and made sure it's screwed on tightly.

    I planned to try screwing the pin part down a bit but it's an 8 sided fitting and seems to fall between my 10mm and 11mm sockets in my socket set and I don't want to mess it up with pliers if it's not going to help?

    Any advice gratefully received!

  2. #2
    Automated Home Legend
    Join Date
    Sep 2014
    Location
    Scotland
    Posts
    2,138

    Default

    Can't be sure because a lot of valves look very similar, but those look like the Peggler Bulldog valve bodies I used to have in my system.

    It's the middle valve in the following post, flanked by two Valencia's:

    https://www.automatedhome.co.uk/vbul...ll=1#post38132

    If that's what they are then yes, after mine were a year or two old they started having difficulties not closing properly even in Stroke 1 mode. A combination of the rubber washer going hard and the pin corroding inside I think. Just not a very good quality valve.

    I replaced them all with Valencia's. Sounds like yours needs replacing too.

    Don't bother trying to turn the hex with a spanner, you won't be able to screw it down any further and if you unscrew it the valve will fall apart.
    Last edited by DBMandrake; Yesterday at 07:56 PM.

  3. #3
    Automated Home Jr Member
    Join Date
    Nov 2018
    Posts
    13

    Default

    Thanks DBMandrake, I'll get the valve swapped next time we have a plumber out to service the boiler.

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