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connecting old copper pipes

Discuss connecting old copper pipes at UK Plumbers Forums; i have recently had to fix a leak on a section of old copper pipe. the pipe is slightly bigger than 22mm and is thick enough to have had a ...
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    Default connecting old copper pipes

    i have recently had to fix a leak on a section of old copper pipe. the pipe is slightly bigger than 22mm and is thick enough to have had a thread put on it. any ideas how to replace a section with 22mm copper?
    there has been mention of a transitional coupling, however this a DHW pipe

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    Default Re: connecting old copper pipes

    it is probaly 3/4" copper you can get 3/4 to 22 soldered
    couplings

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    Default Re: connecting old copper pipes

    Quote Originally Posted by Gasmk1 View Post
    it is probaly 3/4" copper you can get 3/4 to 22 soldered
    couplings
    3/4 copper is smaller than 22mm not bigger
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    Default Re: connecting old copper pipes

    It might be the really really old stuff before 3/4
    It was more like 1/2" iron for size O.D.

    Last time I dealt with it I think I soldered or brazed a female iron to copper on the end of it.
    If it is that stuff ( and it sounds like it ) you won't find a manufactured fitting for it.
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    Default Re: connecting old copper pipes

    Measure O D and post the size.

    Can you not replace it all ?

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    Default Re: connecting old copper pipes

    Use a drift or socket former to create a socket in the end of the old pipe, and then solder 22mm pipe into it.
    Last edited by Ray Stafford; 04-10-2016 at 05:50 PM.
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    Default Re: connecting old copper pipes

    Quote Originally Posted by Ray Stafford View Post
    Use a drift or socket former to create a socket in the end of the old pipe, and then solder 22mm pipe into it.

    A drift won't work Ray. It sounds like screwed copper, it it slightly larger than 22mm. Normally found in old high end houses. Nobody makes a transition fitting, and the threads are " fine taper" so BSP is nowhere near. The copper is as thick as galvanised pipe, so great for scrap.
    The times I have connected to it, we used a 1"BSP male to 22 mm compression fitting. The 1" thread will slide over the pipe and either solder it using leaded solder ( I know!!) or better still hard solder or braze. Then you have a 22mm compression end to go off.
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    Default Re: connecting old copper pipes

    Quote Originally Posted by Chalked View Post
    A drift won't work Ray. It sounds like screwed copper, it it slightly larger than 22mm. Normally found in old high end houses. Nobody makes a transition fitting, and the threads are " fine taper" so BSP is nowhere near. The copper is as thick as galvanised pipe, so great for scrap.
    The times I have connected to it, we used a 1"BSP male to 22 mm compression fitting. The 1" thread will slide over the pipe and either solder it using leaded solder ( I know!!) or better still hard solder or braze. Then you have a 22mm compression end to go off.
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    Default Re: connecting old copper pipes

    Quote Originally Posted by Chalked View Post
    A drift won't work Ray. It sounds like screwed copper, it it slightly larger than 22mm. Normally found in old high end houses. Nobody makes a transition fitting, and the threads are " fine taper" so BSP is nowhere near. The copper is as thick as galvanised pipe, so great for scrap.
    The times I have connected to it, we used a 1"BSP male to 22 mm compression fitting. The 1" thread will slide over the pipe and either solder it using leaded solder ( I know!!) or better still hard solder or braze. Then you have a 22mm compression end to go off.
    Every day's a school day! I don't think I have ever seen that type of pipe.
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    Default Re: connecting old copper pipes

    i have never come across that size or type of copper before must be from the 40's or 50's ?

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    Default Re: connecting old copper pipes

    This is the only image I can find on google. This pipe is brass, but it's the same for copper and they have brass fittings.
    connecting old copper pipes-image.jpg

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    Default Re: connecting old copper pipes

    Quote Originally Posted by Chalked View Post
    A drift won't work Ray. It sounds like screwed copper, it it slightly larger than 22mm. Normally found in old high end houses. Nobody makes a transition fitting, and the threads are " fine taper" so BSP is nowhere near. The copper is as thick as galvanised pipe, so great for scrap.
    The times I have connected to it, we used a 1"BSP male to 22 mm compression fitting. The 1" thread will slide over the pipe and either solder it using leaded solder ( I know!!) or better still hard solder or braze. Then you have a 22mm compression end to go off.
    Thank you
    will give it a try tomorrow, exactly as you said, old high end house
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