connecting old copper pipes

[babbster]

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

 

[Gasmk1]

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

 

[ShaunCorbs]

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

3/4 copper is smaller than 22mm not bigger

 

[Last Plumber]

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.

 

[Last Plumber]

Measure O D and post the size.

Can you not replace it all ?

 

[Ray Stafford]

Use a drift or socket former to create a socket in the end of the old pipe, and then solder 22mm pipe into it.

 

[Chalked]

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.

 

[chris watkins]

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.

There speaks a proper plumber. IMHO

Problem what problem !

With his skills & knowledge he can adapt, repair, overcome & only if absolutely necessary replace to fix the problem.

 

[Ray Stafford]

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.

 

[Gasmk1]

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

 

[Chalked]

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.

 

[babbster]

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

 

[Masood]

Came across this pipe in the Leicestershire area (if it's the same stuff). Heavy gauge copper, screwed. It's called 20-gauge and you can buy compression and end-feed transition couplings for it. The end-feed couplings are brass and cost a fortune but it means you can convert to 15mm or 22mm and weigh in the old stuff...