Dave Plowman (News) wrote:

In article ,
Robin wrote:
Simply running solder into the join would not have passed inspection for
a professional job.

Then you need an inspector who understands basic metallurgy.

I was going by old contract specifications (and before that bye-laws).

The solder had to be built up in layers to give
the thick "bandage" to guard against leaks. The wiping wasn't just to
make it look pretty.

Solder in layers isn't going to seal between layers.

I was wrong to say it /had/ to be in layers but I have seen it done with
successive pourings. It's all molten so I don't see why it would not
seal.

Right - meaning you've not actually ever done it yourself?

Are you confusing it with plumber's metal?


Plumber's metal is solder.

It is a type of solder. Hence the different name.

To fix a copper pipe to lead, you'd use soft solder.

The way a lead to lead joint is done requires a technique to provide the
same sort of strength as the original lead. Hence the ugly lump.

Copper to lead is already well supported. So the only thing the solder has
to do is seal the joint.

Given that lead is easily malleable, the joint is not that well
supported in the presence of knocks,gravity and vibration.

--

Roger Hayter