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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
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Offers and wants: Where can I get swept 28mm elbows & how best to bend 28mm pip

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  1.  
    • CommentAuthorSi.min
    • CommentTimeNov 4th 2009
     
    Hi planning ahead trying to see where I could get 28mm swept elbows from for gravity loop. Also any tips on how to bend 28mm pipe appreciated, seems to be too big for most cheap pipe benders from local DIY stores.

    Thanks
    •  
      CommentAuthorrichy
    • CommentTimeNov 4th 2009
     
    What about Hep2o plastic pipe?

    I know copper is more earthy, but how do green miles plus manufacturing/smelting processes compare?

    Sure bends easy!
    • CommentAuthortony
    • CommentTimeNov 4th 2009
     
    use two 135 s ?
    • CommentAuthorcider
    • CommentTimeNov 4th 2009
     
    If your doing gravity pipework I guess its connected to a solid fuel appliance in which case dont use plastic.
    As mentioned using what i would call 45 bends x2 would work well.
    Other option is to hire a 28mm bender if available.
    •  
      CommentAuthorrichy
    • CommentTimeNov 4th 2009
     
    Why not a mixture of both? Copper for the 1st 1m attached to solid fuel boiler?

    Less heat loss/ transference through plastic compared to copper. Putting the heat where you want it.

    If it has to be copper, then hire a bender.

    P.S. they are called elbows!
    • CommentAuthorSi.min
    • CommentTimeNov 4th 2009
     
    Hi thanks for suggestions food for thought

    Si
    • CommentAuthorCWatters
    • CommentTimeNov 5th 2009
     
    • CommentAuthorsmithy1851
    • CommentTimeDec 27th 2009
     
    hi

    you could bend the 28mm copper by using the old method of filling with silver sand and pulling the radius around a suitable former...

    wants to be nicely packed in the pipe, aneal and allow to cool then, and it will pull round a treat,

    Failing that look for a a pipe bending company in your locality..who uses a mandrel bender...this bends without flattening any of the radius...

    be careful using a bending spring on this size as they have the tendency to get caught up if your not careful..
  9.  
    Or just go to hire company and ask for 28mm pipe bender it comes the same way as a metal conduit bender (on stand)
  10.  
    No plumbers have replied yet I note! (and I am not one but I have just joined up my big boiler, TS, rads, Cold and HW system). Forget using a pipe bending spring unless your middle name is Arnie. In general bending 28mm pipes is not regularly done. You can bend them using hydraulic pipe bending 'presses' - the cheap ones (£250) bend up to 22mm (I broke one of these trying to bend 28 mm pipe!); you need to spend over £350 on professional kit........in other words if you can't hire, it don't bother! Over here (Italy) I can buy 28mm swept copper bends for soldering easily. You have to be a plumber for it to be worth the saving of bending your own pipe over buying pre-formed bends. For your one DIY task just buy the pre-formed bend.
    • CommentAuthorsmithy1851
    • CommentTimeDec 30th 2009
     
    hi,
    if you aneal the copper pipe before bending even using a spring there is no problem to pull the required radius...does take alittle effort...but copper works quite easily..but it does work harden as u use it...

    if you have access to a supplier that produces radius bends in 28mm copper then this will be your easist option...
    pipe benders are only as good as the formers that they use...thats why mandrel benders are always the best...and are used in industry..

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