It's my house for the time being.
OK then it's worth the effort
I cut the 90 off (it was rotten in a couple of places). The horizontal
pipe going to the right was soft also and had some rot on it. I removed
all of that and ended up with this:
http://i2.photobucket.com/albums/y22...se/cutpipe.jpg

There were no threads ANYWHERE on there. The 90 was solder to a section
of copper that was sectioned to what I think is lead (or old
galvanized, whatever it is, it's fairly thick and solid, like a black
pipe).
Wow, how old is the house? When you scrape that pipe with a knife does
it feel and look like lead?
How thick.
What I'm thinking of doing is getting a section of 1.25", cleaning out
the stub from the wall (the inside was cleaned out since I shot this
picture, I'll wipe it with some wet or dry to remove the remaining
crud).
If it is lead, you'll have to ream out the inside of the pipe to get
the solder to take. The piece you insert should be female and allow you
to slide another 90º into it and secure it with a nut and compression
gasket. Also this will be like "sweating a pipe in the old fashioned
way" do you have a local expert that can advise you on how to do that?
You could consider stick epoxy if that outlet pipe is sound.
If you're going to be in this house for a while you'll want to get a
thicker walled "extension piece" to sweat into the outlet lead pipe.
Otherwise you'll be doing this again in ~10 years.
That thin stuff that's normally sold for drains and P traps wears out.
It would have been cheaper for her to buy a new contact lens, but then
I'd be repairing this at another time.
Aha.. I've been there. These thin brass Ps can be like paper when you
go to take one apart they will just crumble in your hand. I fact you
should be careful when you do this. I always squeeze the P before I
take it apart. It can be worn down to the chrome plating and very
sharp. The high wear point is the outside of the radius and usually is
the first place it fails.
Richard