Leaking solder connection

[TonyR1]

I have discovered a very old end feed 22mm t connector under the bath is very gently weeping water. It’s in a place and with pipework that are going to make it a pig to get at and replace as it is nested between other pipes. If I drain the system would it work to heat it up and end feed some more solder into the joint or any other suggestions that could fix it please? The leak is at a level where the pipe is slightly moist and mild dampness on the floorboards underneath. I suspect if I put something over the floorboards to catch it the water would evaporate before it went anywhere but don’t feel comfortable leaving it like that. Thanks

 

[ShaunCorbs]

No you would have you remove the tee you might find one end not soldered

 

[TonyR1]

It’s definitely soldered as it would not hold the 2 bar water pressure if it wasn’t and its been that way for 40 years would be my guess. I think it’s just that the solder is not complete and there’s a crack in the solder that water is seeping through under pressure.