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Cast iron radiator connectors

Discussion in 'Plumbing and Central Heating' started by stu550, 12 Feb 2020.

  1. stu550

    stu550

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    Hi all.

    I need to find some connectors for these radiators to be able to connect to some normal size copper pipework.

    Can anyone give me any hints on the size I should be looking for?

    Thanks

    Stuart
     

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  3. Terrywookfit

    Terrywookfit

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    Remove the tail and fit a reducing bush down to 1/2"
     
  4. stu550

    stu550

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    Thanks, any idea on what thread size it will be on each radiator or is there a choice of a lot?!
     
  5. Terrywookfit

    Terrywookfit

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    Remove tail and measure it !
     
  6. JohnD

    JohnD

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    It will almost certainly be a BSP size.

    The nominal measurements are nowhere near the measured size, but you'll find a table explaining it.

    You will not be connecting the pipe to the radiator, you'll be connecting the pipe to a valve, and the valve to the (removable) tail in the radiator.

    I expect it'll be a 15mm x 1/2" BSP valve. Possibly 15mm x 3/4" BSP

    You can probably find a valve that will fit the union and nut already in the radiator. They can be very difficult to remove, if old. Modern practice is to put PTFE tape on the threads of the tail. In fifty years time we'll know if it worked.
     
    Last edited: 12 Feb 2020
  7. HERTS P&D

    HERTS P&D

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    Remove the tail and go to a plumbers merchant, they will be able to sort you out.

    Andy
     
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  9. kidgreen61

    kidgreen61

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    If they're connected to a modern combi boiler, be prepared for a load of grief from the rust getting in the plate hex and causing problems.

    Won't be an issue with an older boiler
     
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  10. Nige F

    Nige F

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    In 100 years hemp+paste will still be holding;)
     
  11. stu550

    stu550

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    Thanks all. These are quite chunky - some photos below. Although I’m still not sure which bit is to be replaced when you refer to the tail. Here are some photos giving some scale. iOS Image - 1490338924.jpg iOS Image - 2524742323.jpg iOS Image - 3507229065.jpg
     
  12. stu550

    stu550

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    Thanks all. Here are some photos showing the scale of the radiators just in case it changes anything.
     
  13. stu550

    stu550

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    Is this the tail? iOS Image - 1778416029.jpg
     
  14. Terrywookfit

    Terrywookfit

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    The tail is the Chrome brass bit which is part of the valve !!

    The hexagonal ones are reducing bushes .
     
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  15. DIYnot Local

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