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Double entry radiator valves flow and return

Discussion in 'Plumbing and Central Heating' started by Al@n, 19 Aug 2019.

  1. Al@n

    Al@n

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    Can anyone tell me for certainty which is the flow and return, I'm guessing the flow is the pipe on the left of the valve?, there are no arrow markings on the double entry valve indicating the flow and return

    This will allow me to fit the new pipe into the right 22mm pipework below the floorboards

    Pic of my rad valve

    https://www.diynot.com/diy/media/img_20190819_151900.103177/

    Found these other two images on Google which appear to differ on what the flow and return is :(

    https://www.diynot.com/diy/media/screenshot_20190818-014237.103176/

    https://www.diynot.com/diy/media/screenshot_20190818-013912.103178/
     
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  3. The flow is on the Left,maybe wire brush it and see the arrow.

    looks like a radiator commonly used by servowarm,they can be fun :!:
     
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  4. Al@n

    Al@n

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    There are no arrows whatsoever :(
    Ripping it all out :)
     
  5. ianmcd

    ianmcd

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    yes the flow is on the left in your valve, when you say ripping it all out do you mean replacing the rad and the twin entry valve
     
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  6. its often the best idea to do that and start fresh with a brand new system (y)
     
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  8. Al@n

    Al@n

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    Yep upgrading to 15mm and new rads
     
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  9. ianmcd

    ianmcd

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    Highly recommended those twin entry valves can be a bit of a nightmare for leaking, most modern Thermostatic radiator valves are bi-directional anyway so wouldnt matter if you got the flow and return mixed up
     
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  10. Al@n

    Al@n

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    But if i got the flow and return wrong on the 22mm main run would that not be a problem?
     
  11. ianmcd

    ianmcd

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    Nope wouldnt be a problem, older TRVs used to be noisy when trying to close if fitted the wrong way round but modern ones dont, only designer vertical rads sometimes have a baffle installed so the flow can only connect to a specific side , standard rads dont have baffles so it doesnt matter
     
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  12. Al@n

    Al@n

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    Great, that's reassuring to know
     
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