5 Jun
2004
5 Jun
'04
4:10 p.m.
> When copper tubing is used, what is it soldered
with?
today: Tin 99+% Previously: Why do you think they
called it
"soldering"? The fortunate thing is that virtually all of it is IN the
joint and very little is exposed to the water.
....
This day and age... silver solder.
....
I stand myself corrected. 95% tin, 5% copper.
....
In the UK, pipes for drinking water now have to be
soldered with
lead-free solder. I am not sure (a) how much a problem leaded solder was
and (b) if the lead-free stuff is actually any safer...
When was the "changeover"?
Parts of my house are a hundred years old, and I'm sure
that I'm not the only one who does not live in a
little box on the hillside made of ticky-tacky.
> In addition, most of the public say "lead
pipe" when talking about
> galvanized iron.
I can assure you the stuff we have over here is lead,
or at least a
high-lead-containing alloy. It melts at far too low a temperature to be
iron, and it has a density similar to that of lead.
I'm certainly not questioning the existence of lead pipe -
I replaced some in my house with iron pipe.
But it's less common now than it used to be, and I've run
into more than a few extraordinarily ignorant people who
will point to a piece of galvanized pipe and [INCORRECTLY]
call it "lead pipe" (including staff at Home Depot!)
About thirty years ago, Seattle found out that there were
still bamboo pipes in active use!