How to solder copper pipe

Copper pipe, or tubing as it is sometimes called, is an excellant material to contain water, air, or refrigerants. Joining it together with "sweat" joints is the ideal application. This procedure, while not difficult requires some practice to master.

Instructions

Difficulty: Moderate

Things You’ll Need:

• torch
• flux
• solder
• sandpaper or emory cloth
• wire fitting brush

1. The most important step in sweating (soldering) copper pipe is the cleaning of the pipe and fittings. Sand the pipe with emory cloth until it shines, and use a fitting brush to clean the inside of the fittings. You can use the emory cloth if you dont have a brush.
2. Next, brush a light coat of flux on both the fitting and the pipe. This is what causes the solder to flow into the joint, and it will not work without it. Put the joint together and you are ready to sweat.
3. Heat the pipe and fitting with your torch until you notice a green glow in the flame. This should indicate that you are ready to apply the solder. Touch the solder to the joint, and it should flow right into the joint. When it drips out the bottom, stop. Let the joint sit untouched for several seconds to insure that you dont break it loose.
4. You should be able to put the water, air, or whatever on the joint now. If done properly a sweat joint is virtually leak proof and forever. This procedure is one every DIY buff should master, it WILL come in handy someday.

Tips & Warnings

• Be careful when soldering anything. The intense heat of the torch and fittings can cause some nasty burns.