Copper Elbow joint black

[John2016]

Hi,

I recently had to move the radiator pipe to fit large heaters in the hallway. I have used yorkshire fitting without any additional solder. The joint can be running for 3 days without any leaks, however, looking at it, the colour of the joint does not look right... Should it not be a bring colour?

I'm concerned that in the future the joint will leave, as we are having wooden flooring laid.

What would cause the elbow joint to go black?

Thanks

 

[gigz]

Looks like you haven't cleaned the flux off it thats all. Wash it and give it a wire wooling, should be ok.

 

[John2016]

Looks like you haven't cleaned the flux off it thats all. Wash it and give it a wire wooling, should be ok.

Thanks

I cleaned the flux off well, but when it was cleaned off the elbow was black.

I was thinking of de-soldering and then placing a new yorkshire joint, while adding a small amount of extra solder. What do you think?


Thanks

 

[gigz]

While i can't guarantee it won't ever leak, i wouldn't bother. Flux is better cleaned while the pipe/fitting is still hot. I would just rub it with wire wool, that should do it. Fittings generally do discolour when heated.

 

[Madrab]

Nope, if the joint's dry and running at pressure then it should be fine. Chances are that you maybe ran it a little too hot or it could even be a bad can of gas or your blowtorch that's not burning as clean as it should. As @gigz mentions, give it a rub round with wirewool/scotch pad and if the solder's clean all round then don't worry about it.

 

[MJGas]

I'd be more concerned about that pipe not being sleeved through the wall.