How to Repair a Copper Sweating Mistake

To sweat a pipe means to solder it to another pipe. Plumping and soldering with copper pipe is a learned skill. Over time, a person gets better but may make a few mistakes in the beginning. Sometimes a solder is not correct, the pipe doesn't fit, or it's simply not attached correctly. Repairing a copper sweating mistake is very quick and does mean that already soldered pipes are ready to use again.

Difficulty: Moderate

Instructions

Things You'll Need:

• Pipe
• Vice
• Blowtorch
• Flame
• Goggles
• Gloves
• Pliers

1. Place the pipe into vice in the correct position. Be sure the part of the pipe that needs to be removed is easily accessible and a comfortable height for you to work. Tighten the pipe into the vice position to prevent slipping.

2. Switch on the blowtorch by releasing the gas knob and lighting with an open flame. Be sure to wear safety goggles and fireproof gloves when working with the blowtorch.

3. Hold the pipe securely with your left hand with a pair of strong pliers as you apply heat to the pipe. Be sure to hold the pliers firmly on the piece of pipe you wish to remove, usually at the top of the elbow piece. The heating should last no more than a few seconds.

4. Wiggle the elbow slightly with the pliers as you apply heat to the original soldered seam. This helps loosen the pipe and indicates job progress.

5. Twist elbow pipe all the way off the viced piping. Be sure to handle the pipe with care as it will be extremely hot at the burn site.

6. Allow pipe to cool before reapplying solder or work with pipe immediately while the surface is still warm.