I just replaced my kitchen faucet with a new faucet that was sold-as is, in-box, from an auction. After spending hours trying to get the old faucet off (years of rust and corrosion), I installed the new faucet and connected the sprayer hose and hot and cold feed pipes to new plastic/mesh supply lines that connect to the copper underneath the sink. This faucet is a pull-down sprayer style faucet so all the water comes out the sprayer hose after entering the hot/cold mixer from the supply lines.
Well, I got it all set up and sealed up with teflon tape and everything looked great so we turned the water, when I noticed the smallest bead of water begin to form at the solder on the sprayer hose connection, where the copper pipe that is fed from the mixer attaches to the mesh hose. The water is coming from the joint where the copper pipe is soldered to the connector that the sprayer hose screws into-- that is, the solder that was done at the factory. It's a tiny, tiny leak (two out of four times I ran the water and did not see any water bead out) but it is clearly coming through a bad part of the solder and not from the threaded part of the connection.
The faucet was bought as-is from auction so factory warranty is out of the question, and it was such a pain getting it all installed that I'd really hate to have to go and replace the thing again (especially since faucets are expensive). Can I use plumber's putty to seal up the hole in the apparently bad solder or should I try to re-solder it? Do I have any other options?