My main water shutoff valve inside my house needs to be replaced. I've got access to the shutoff valve in the street, but that valve leaks a bit, too. The water doesn't flow with the street-side valve turned off, but there are a steady flow of drips (maybe a drip per second?).
What's the correct method to sweat on a new valve when the joint might still have a bit of water seeping through it? I've seen a couple videos on YouTube suggesting stuffing a piece of bread up the pipe, but the little voice in my head is saying "ummm...yeah, don't do that here."
My plumbing is all copper, and I would like to keep it that way. I'm pretty comfortable sweating joints on nice, dry, clean pipe.