Stop pipe dripping long enough to solder
Okay, I'm having a tough time soldering a joint of 1" copper. It's the main run in my apartment building (not mine, I just live here) and I can't get the darn thing to stop running a tiny bit of water long enough the get the joint soldered. I was going to use the wad of bread trick, but the owner is hovering over m... er, I mean, he's here, and says no no no I'm not sticking no bread in the pipe it will clog the faucets in the building. Really, he said it just like that, all one sentence.
So, what tricks do you guys have up your sleeves for dealing with this?
I mean the water, not the building owner.
~ Ted W ~