Christian McArdle wrote:

Any water left in the pipe will make a good soldered joint very
difficult if not impossible to make, you might consider a push fit
fitting for your final connection.


OTOH, despite stories and myths about this, I've never had the slightest
problem soldering joints in previously wet pipework. It's important to have
a good torch, though.

A little wetness is usually ok, it will soon boil off. A continuous
trickle however is likely to mess it up.

In those situations the old trick of stuffing a ball of fresh bread up
the end of the pipe will usually halt the trickle for long enough to
solder it. It will wash out the pipe next time you turn a tap on.

--
Cheers,

John.

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