In order to solder copper pipes Here are some basic steps:
1 Use emery cloth to clean inside/outside of copper tubing.
2 Apply flux to pipe and fitting with acid brush.
3 Heat fitting with propane torch until flux bubbles.
4 Apply solder to fill joint; wipe off excess solder with rag.
5 For an easier way to sweat joints, use pre-soldered fittings, which require the application of heat only.
6 Slide nut onto tubing, then tighten flared connection using two wrenches.
7 For a no-solder compression fitting, slide brass ferrule onto pipe, add nut and tighten fitting to join two pipes together.
8 Copper fittings lined with neoprene gaskets permit pipe connections without special tools, wrenches or a propane torch.