What is solder used for in copper plumbing?

Melting to join copper pipe and fittings.

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  1. Wrapping pipes for insulation
  2. Cleaning drains of clogs
  3. Melting to join copper pipe and fittings ✔

Why: Solder is a metal alloy melted at a joint to seal copper pipe connections.

Huh, didn't know that: Solder is a metal alloy melted at a joint to seal copper pipe connections.

The dad joke
Solder is the glue of the metal world.
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References

Answer: Melting to join copper pipe and fittings. Solder is a metal alloy melted at a joint to seal copper pipe connections.

  1. Scouting America: Plumbing www.scouting.org/merit-badges/plumbing
    Solder a copper connection using a gas torch
    Checked 2026-11-07.

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