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  • FIRST POST
    • timbr00
    • By timbr00 1st Oct 17, 6:18 PM
    • 6Posts
    • 1Thanks
    timbr00
    replacing radiators with smaller metric versions
    • #1
    • 1st Oct 17, 6:18 PM
    replacing radiators with smaller metric versions 1st Oct 17 at 6:18 PM
    i wish to replace 3 radiators that are imperial sizes e.g 17595h x 690w. the nearest i can find is 1600 x 700. how can i fit one that is 159mm shorter without adjusting the pipes?

    i have seen radiator valve adapters of 80mm in tool station but not sure if they do what i am after.


    my thinking is that 80mm x 2- 160mm and the pipe will move by 1mm to fit.

    please excuse the terminology, i assume the TRV has an external thread and nut, the adapter has an external thread which fits into the radiator and an internal thread. how does this then fit to the TRV? do i have to remove the TRV from the pipe to wind this on? and what happens with the nut? or have i totally mis understood how these work or is there a better way?
Page 1
    • Alex1983
    • By Alex1983 1st Oct 17, 6:25 PM
    • 665 Posts
    • 373 Thanks
    Alex1983
    • #2
    • 1st Oct 17, 6:25 PM
    • #2
    • 1st Oct 17, 6:25 PM
    That is probably what you want, google rad valve extension and you see images of what they look like, in work we use all different sized ones starting at 20mm and going up to 80mm.
    • TheCyclingProgrammer
    • By TheCyclingProgrammer 1st Oct 17, 6:25 PM
    • 2,903 Posts
    • 1,658 Thanks
    TheCyclingProgrammer
    • #3
    • 1st Oct 17, 6:25 PM
    • #3
    • 1st Oct 17, 6:25 PM
    You can get pipe tail extensions though they aren’t that attractive and I’ve seen a lot of negative reviews saying they eventually leak. If you can access the pipes I would get them modified.
    • timbr00
    • By timbr00 1st Oct 17, 6:32 PM
    • 6 Posts
    • 1 Thanks
    timbr00
    • #4
    • 1st Oct 17, 6:32 PM
    • #4
    • 1st Oct 17, 6:32 PM
    As A new member I can’t post links but I was looking at 80mm valve extension on toolststion site. Just can’t figure out where the nut on trv would go
    • Alex1983
    • By Alex1983 1st Oct 17, 6:36 PM
    • 665 Posts
    • 373 Thanks
    Alex1983
    • #5
    • 1st Oct 17, 6:36 PM
    • #5
    • 1st Oct 17, 6:36 PM
    The ones your looking at screw into the radiator and then the radiator tail goes inside the extension you fitted.

    Bit of advice screw the tail into the extension and then put it all in to the radiator in 1 piece and don’t over tighten the extension into the radiator it will snap off.
    • timbr00
    • By timbr00 1st Oct 17, 8:06 PM
    • 6 Posts
    • 1 Thanks
    timbr00
    • #6
    • 1st Oct 17, 8:06 PM
    • #6
    • 1st Oct 17, 8:06 PM
    Thanks, I was hoping to shut the valves off and just remove the radiator I guess the only way to do it is to drain the whole system?
    • Alex1983
    • By Alex1983 1st Oct 17, 8:42 PM
    • 665 Posts
    • 373 Thanks
    Alex1983
    • #7
    • 1st Oct 17, 8:42 PM
    • #7
    • 1st Oct 17, 8:42 PM
    No you will be able to do it by just shutting the valve off. The tails are after the shut off. You can shut both rad valves, drain and remove rad. Take the old tails out of the old rads and then fit them into your new extension pieces and then into new rad.
    • timbr00
    • By timbr00 1st Oct 17, 8:54 PM
    • 6 Posts
    • 1 Thanks
    timbr00
    • #8
    • 1st Oct 17, 8:54 PM
    • #8
    • 1st Oct 17, 8:54 PM
    Thanks, I assume that as each side of the radiator is 80mm shorter than existing. Re using old valves with the 80mm adapters will fill the gap.
    • Alex1983
    • By Alex1983 1st Oct 17, 9:06 PM
    • 665 Posts
    • 373 Thanks
    Alex1983
    • #9
    • 1st Oct 17, 9:06 PM
    • #9
    • 1st Oct 17, 9:06 PM
    Should be, the extensions come in all different sizes if it slightly out you could get the appropriate sized one.
    • Cornucopia
    • By Cornucopia 1st Oct 17, 9:22 PM
    • 9,507 Posts
    • 9,103 Thanks
    Cornucopia
    Maybe I've misunderstood what you want to achieve, but I would have thought that the new radiator will have inlets at the same height from the floor (more or less) as the old radiator. Therefore fit the new one in the same location so that the inlets line up with the existing pipework and move the wall brackets accordingly.

    I've swapped out a couple of radiators as a DIY exercise, and found it a reasonably straightforward job. I didn't have to drain the system on either occasion.
    I'm a Board Guide on the Phones & TV, Techie Stuff, In My Home,
    The Money Savers Arms and Food Shopping boards. I'm a volunteer to help the boards run smoothly, and I can move and merge threads there. Any views (especially those on the UK TV Licence) are mine and not the official line of moneysavingexpert.com.

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    • Alex1983
    • By Alex1983 1st Oct 17, 9:28 PM
    • 665 Posts
    • 373 Thanks
    Alex1983
    I’m assuming it’s the other way. 690mm high is the size of the myson round top radiators and the length of the new one is slight shorter.

    If it is a myson round top radiator your taking out, you can buy a direct replacement, myson still make round top rads. They will be more expensive though.
    • ic
    • By ic 1st Oct 17, 11:22 PM
    • 2,519 Posts
    • 1,296 Thanks
    ic
    Assuming you're looking at these: https://www.toolstation.com/shop/Heating+%26+Insulation/d230/Radiator+Valves/sd2762/Radiator+Valve+Extension/p49119 - make sure you have one of these to tighten them up: https://www.toolstation.com/shop/p63865 - also be liberal with the ptfe tape.
    * my posts are made in good faith and only represent my own opinion, experience or understanding of a situation.
    • timbr00
    • By timbr00 2nd Oct 17, 8:39 AM
    • 6 Posts
    • 1 Thanks
    timbr00
    unfortunately the pipes run from the floor just to the sides of the radiators. when sizes went from imperial to metric they someone decided instead of making a radiator 1756mm they would make it 1800 or 1600.
    • timbr00
    • By timbr00 2nd Oct 17, 8:42 AM
    • 6 Posts
    • 1 Thanks
    timbr00
    yes ic thats the ones.

    myson make imperial ones i think its the HC range however at £211 each v £60-£85 I'm ready to accept a little playing about to get something to fit!
    • Cornucopia
    • By Cornucopia 2nd Oct 17, 9:57 AM
    • 9,507 Posts
    • 9,103 Thanks
    Cornucopia
    unfortunately the pipes run from the floor just to the sides of the radiators. when sizes went from imperial to metric they someone decided instead of making a radiator 1756mm they would make it 1800 or 1600.
    Originally posted by timbr00
    Ah, okay, so we are talking 1756mm WIDE, not H as in post #1 - that makes sense.
    I'm a Board Guide on the Phones & TV, Techie Stuff, In My Home,
    The Money Savers Arms and Food Shopping boards. I'm a volunteer to help the boards run smoothly, and I can move and merge threads there. Any views (especially those on the UK TV Licence) are mine and not the official line of moneysavingexpert.com.

    Board guides are not moderators. If you spot an inappropriate or illegal post then please report it to forumteam@moneysavingexpert.com
    • EmmyLou30
    • By EmmyLou30 2nd Oct 17, 2:56 PM
    • 341 Posts
    • 403 Thanks
    EmmyLou30
    We had 2 like this, one we managed to get enough play in the pipes to go up to a 50mm wider rad, the other we added an extension tail to one side of the rad and dropped down 50mm. It does look a little like a bodge and was a nightmare to get to seal too but we had no choice as the pipes pop out the wall.
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