Can you use copper pipe for propane plumbing?
Copper tubing is used for underground propane service lines but should be installed by a licensed propane company. See propane101.com/gasserviceline.htm for a better explanation.
After you've cut the copper pipe to the proper length, clean the end of the pipe with a 4-in-1 tool. Clean the area to be inserted in the fitting until it is bright all around. You can also use a separate brush, fine sandpaper or steel wool.
If you're using the 4-in-1 brush, slide the pipe inside the brush. The standard 4-in-1 tool will clean both 1/2 inch and 3/4 inch pipe and fittings. Be sure you are using the right size.
Turn the tool back and forth until the pipe is bright. You can also hold sandpaper or steel wool around the pipe with light pressure. Then turn the tube back and forth several times.
You must also clean the inside of all fittings. You can use the 4-in-1 tool, brush, steel wool or sandpaper. Take the time to clean them thoroughly.
Debris or foreign matter left in the pipe causes a poor seal. Next, apply a light coat of soldering paste or flux to the cleaned end of the copper pipe. Use a flux brush, an old toothbrush or a wooden paddle for spreading the flux.
Flux or soldering paste ensures a firm bond between the copper and the solder. Also apply flux to the inside of the cleaned fittings. Use a flux brush, wooden paddle or toothbrush to apply the soldering paste.
The flux or soldering paste will keep the copper from oxidizing when heated. Never use acid core solder for sweating copper pipe. Place the copper fitting on the pipe only after it is thoroughly cleaned and coated with soldering paste.
When the fitting is firmly in place, rotate both the pipe and the fitting several times to spread the flux evenly. A propane torch is an ideal tool for sweating copper pipe. If you look at the flame of a propane torch you will notice there is a lighter blue, well-defined flame in the middle of a darker blue flame.
The tip of this light blue flame is the hottest part of the flame. Play the flame along the fittings and the pipe to bring them up to soldering heat. Then concentrate the heat in the middle of the fitting.
The light blue flame should be just touching the fitting.
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