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There are three basic ways to join pipe and tube: 1. Pour into the joint lead 2.screwing pipes and threaded fittings soldering or gluing 3.Collage At some plumbers pipe joints tight black iron with hot water, lead liquid. Today, however, sewer pipes are attached to flanges and neoprene gaskets. Most of galvanized pipes are threaded. They can be screwed together without any preparation, but the seal until it rusts closed. It is also very dif ficult to turn the hoses. Teflon tape makes it easier and joints, and joints. Be careful though.
Teflon turns the son so easily that you can tighten them too far and break the pipe. The copper tubes are usually welded. Clean the joint with steel wool or sandpaper. Do not touch the joint after cleaning. Your fingers can leave a little fat will push the welds. Apply a light coat of soldering flux corrosive to the ends together, both in and out. Assemble the joint just as it will be when finished. Now the light of a propane torch. When the flame moves, move the torch to the tip of the flame is blue-inch 1 / 2 to 3 / 4 of the town. Heat the whole joint and along the tube 2 to 3 inches in all directions. Watch where you point the flame. Heat until the flux begins to boil. Do not overheat.
Remove the torch and touch the solder to the end of the joint. If the seal is clean and fluxed and heated at the right temperature, the solder will melt immediately and circulate throughout the joint. Do not move the joint until the solder has cooled. If the joint is too hot, the solder will not stick. In this case, use pliers to pull the joint apart hot. Allow to cool, clean, feed, and try again. You can not solder a wet seal. Even a drop of water is too.
If you turned off all the valves and open all faucets, water still flows through the line, stuff some bread upstream from the line. This will prevent the water long enough to weld. Later, when you turn on the water, the bread will dissolve and be flushed from the nearest tap. Seals plastic pipes are the same as the copper pipe joints, except that they are cemented rather than welded. After cutting and cleaning the edges with a file and a knife, a brush of cement around the outside of the pipe and inside the fitting.
Plastic cement is really a solvent which dissolves the plastic surface. When it evaporates (in about 10 seconds), the joint is fused. This does not give you much time to the position of the joint and wipe off excess cement. After plastic pipe has been attached, there is no way to remove it except by cutting.
see :The advantages of plastic piping
Teflon turns the son so easily that you can tighten them too far and break the pipe. The copper tubes are usually welded. Clean the joint with steel wool or sandpaper. Do not touch the joint after cleaning. Your fingers can leave a little fat will push the welds. Apply a light coat of soldering flux corrosive to the ends together, both in and out. Assemble the joint just as it will be when finished. Now the light of a propane torch. When the flame moves, move the torch to the tip of the flame is blue-inch 1 / 2 to 3 / 4 of the town. Heat the whole joint and along the tube 2 to 3 inches in all directions. Watch where you point the flame. Heat until the flux begins to boil. Do not overheat.
Remove the torch and touch the solder to the end of the joint. If the seal is clean and fluxed and heated at the right temperature, the solder will melt immediately and circulate throughout the joint. Do not move the joint until the solder has cooled. If the joint is too hot, the solder will not stick. In this case, use pliers to pull the joint apart hot. Allow to cool, clean, feed, and try again. You can not solder a wet seal. Even a drop of water is too.
If you turned off all the valves and open all faucets, water still flows through the line, stuff some bread upstream from the line. This will prevent the water long enough to weld. Later, when you turn on the water, the bread will dissolve and be flushed from the nearest tap. Seals plastic pipes are the same as the copper pipe joints, except that they are cemented rather than welded. After cutting and cleaning the edges with a file and a knife, a brush of cement around the outside of the pipe and inside the fitting.
Plastic cement is really a solvent which dissolves the plastic surface. When it evaporates (in about 10 seconds), the joint is fused. This does not give you much time to the position of the joint and wipe off excess cement. After plastic pipe has been attached, there is no way to remove it except by cutting.
see :The advantages of plastic piping
