||10-04-2005 05:22 PM
Cannot unsolder a joint
I need to unsolder a joint but am unable to. It is 1/2 copper going into an inline shutoff valve. I need to replace an outside faucet but cannot unsolder it from the inside valve. I am using a propane torch and I have tried heating it for up to 3 - 4 minutes but it will not budge even with gentle persuading with a vice grip. The pipe is horizontal and since the outside valve is open, I assume empty of water. It is about 20 years old. What am I doing wrong?