Galv steel to copper

[Plumb Tidy]

Hi lads any ideas how to join what looks like galv steel to copper. This is the flow pipe to and from the boiler the steel pipe has rubber away on the joist and has corroded.

 

[ShaunCorbs]

True weld

compression fittings normally a 3/4 olive

 

[exedon2]

How old is system? Thats just possibly zinc plated thin wall steel from early 70s

 

[Plumb Tidy]

I’m not sure how old it is there was a back boiler in the property that go decommissioned then this got put in. Would a normal 3/4 or 22mm compression joint do it?

 

[ShaunCorbs]

I’m not sure how old it is there was a back boiler in the property that go decommissioned then this got put in. Would a normal 3/4 or 22mm compression joint do it?

yes 22mm with a 3/4 olive

 

[Harvest Fields]

Isn’t it soldered? It looks soldered?

 

[ShaunCorbs]

Isn’t it soldered? It looks soldered?

yep you can solder them but there a pain

 

[Plumb Tidy]

Great cheers Shaun the true weld you spoke of. Do you believe that’s what’s used to solder the two pipes currently. I usually repair car radiators with some silver solder and rods more like brazing can that be done in this case as it’s non potable water? as I have been wondering what they have used to solder up that’s there already. Cheers for your help mukka!
[automerge]1604956932[/automerge]
I will go for the compression fitting with a ptfe chaser just the solder is a bit more of a better finish

 

[ShaunCorbs]

Great cheers Shaun the true weld you spoke of. Do you believe that’s what’s used to solder the two pipes currently. I usually repair car radiators with some silver solder and rods more like brazing can that be done in this case as it’s non potable water? as I have been wondering what they have used to solder up that’s there already. Cheers for your help mukka!

that’s the name of the tube

standard leaded solder used
[automerge]1604957031[/automerge]

Great cheers Shaun the true weld you spoke of. Do you believe that’s what’s used to solder the two pipes currently. I usually repair car radiators with some silver solder and rods more like brazing can that be done in this case as it’s non potable water? as I have been wondering what they have used to solder up that’s there already. Cheers for your help mukka!
[automerge]1604956932[/automerge]
I will go for the compression fitting with a ptfe chaser just the solder is a bit more of a better finish

you can try soldering but sometimes you can have problems getting it to hold / leak free

 

[Plumb Tidy]

compression with a ptfe chaser it is. Nice one Shaun.

 

[Harvest Fields]

yep you can solder them but there a pain

Isn’t that because you cannot use normal
Solder?

 

[ShaunCorbs]

Isn’t that because you cannot use normal
Solder?

no you can use normal just difficult

 

[Harvest Fields]

Ok. Didn’t know that. Thought there was special flux.

 

[exedon2]

Seem to remember using 'bakers soldering fluid' on that awful stuff
There was also a copper plated version,.

 

[Last Plumber]

Sometimes it is best to re-tin it first.