Lead Pipe

[lightman]

window weights in my part of the country are cast iron.

Mine too! I've never seen a lead window weight.

[303Guy]

I picked up some 3" lead pipe from my scrap dealer. No way is it pure. It's quite tough, pretty ideal for cast boolits I'd say. Under sink drain pipe would be pure, yes. But this 3" lead pipe was external down pipe (painted). I've had lead sheeting that rings like a bell. It was painted so would likely not have been roof flashing.

1) Does anyone know what percentage of lead the pipe is likely to be?
Pipe that I've XRF scanned shows:
0.6%Sn
3.59%Sb
95.9%Pb

That sounds about right for my particular lead pipe.

[jsizemore]

What I'm wondering is what plumber would be surprised that a lead drain from 1920 would leak.

More like the plumber was surprised to even find a 3" lead waste line.