Leaking Solder Joint

[d4nnyboy]

The past couple of months I'v been installing a Rad in each room of the house in order of them being decorated. The hall is next, I'v added the new Rad in the hall to the existing pipes running down the wall which I installed recently for the front room feed.

All is well with the new Rad an the newly soldered joints apart from an older joint which has a small drip, I'm guessing it was disturbed when I put new T's on the existing pipes..it was quite difficult to get the T's in.

As I'm a DIY'er and not a pipe fitter I'm unsure how to repair it, do you simlpy reheat the joint and apply more solder? or would that older joint need to be replaced?
I obviously dont want to be boxing any pipes in that are buggered!

Any advice will be apprieciated.

 

[Puddle]

Cut joint out and fit new,old joint probably not soldered correctly,so at best, all you will be able to re solder, is the little bit that was done before,as the rest of the fitting will be to contaminated, to let new solder run,leaving most of the fitting unsoldered again 😱

 

[justlead1]

Hi. When soldering joints on a closed circuit (cutting in to existing etc) leave an end of the pipework open to atmophere, so as the increase of pressure due to heat, within the pipe work is avoided, as this will cause leaks on capillary joints in some situations. Good Luck

 

[WHPES]

You will need to replace it. The joint will not have been right from the start - the solder will not have run and sealed it. This can be caused as stated above by pressure, or not cleaning the pipe ends and fitting properly . insufficient flux or contamination.

Cut out a section either side of the faulty joint and fit a new section with joint at either end. If it is difficult to dry the pipes, use compression fittings.

If the pipes are too rigid and you can't pull them far enough apart to get the joint in, you can use slip couplings.

 

[d4nnyboy]

It's clear from the replies that I need to redo the joint,....then thats what i'l do.
Could of used one of them slip couplings..well it doesn't matter now the leaking join is an elbow at the bottom.

Thanks alot for the advice