Copper sweat soldering question

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JIMMIEM

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1/2" Copper Hot water supply -> Gate Valve -> 1 inch length of 1/2" Rigid Copper tubing -> 1/2" to 3/8" Copper Reducer Coupling -> 3/8" Flexible Copper tubing -> Dishwasher. I have to redo the tubing connected to the dishwasher. Can I heat the Reducer Coupling so that I can replace it without affecting the Gate Valve joint?
 
A pro, maybe. An amateur....doubtful.

How far away from an existing sweated joint would one have to be to sweat in a new joint in a run of pipe without fear of affecting the existing joint?
 
The trick is use small flame, wrap the joint you don't want to melt with a small wet rag. If you can control the amount of heat you can do it. You only need about 350-400 degrees F to melt the solder. You can probably even do that with one of those butane pencil torches.
Like Mat said Pro > Easy
I remember my first solder job and it wasn't pretty :eek:
 
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