Req 6d — Soldering Copper
6d.
Solder a copper connection using a gas torch.
This is one of the most recognizable plumbing skills. A good soldered joint depends on preparation even more than on the flame itself. Clean metal, correct flux, even heating, and patience all matter.
🎬 Video: Copper Pipe Soldering-How to Solder for Beginners Video (video) — https://youtu.be/TOtOpixWTXE?si=Jl_jeHOlvComjB_k
The basic process
- Cut the copper cleanly.
- Debur the pipe.
- Clean the pipe and fitting surfaces until the metal is bright.
- Apply flux to the cleaned surfaces.
- Assemble the joint fully.
- Heat the fitting carefully with the torch.
- Touch solder to the heated joint so it flows into the connection.
The key idea is that you usually heat the joint, not the solder directly. If the metal is hot enough and properly prepared, the solder will flow where it needs to go.
Signs of Good Soldering Prep
Most joint problems start before heating
- Pipe end is smooth and deburred
- Metal surfaces are cleaned bright
- Flux is applied only where needed
- The joint is assembled fully before heating
- The workspace is protected from flame and heat
Soldering teaches careful preparation and heat control. The next option shifts back to service work in tight spaces by replacing a faucet.