How to Sweat Copper Pipe

Sweating a copper water line is relatively easy. Knowing how to sweat copper pipe allows a do-it-yourselfer to install pipe yourself. A properly sweated joint will last for years (in many cases decades).

Sweating copper pipe isn’t difficult, but it takes practice. Mastering a perfectly sweated copper joint takes a bit of practice. Be patient! Your first couple of attempts may not look beautiful, but soon you’ll be sweating copper that not only doesn’t leak but also looks good.

1

Use the wire brush to clean the pipe.

Clean down to bare metal.

2

Apply flux paste.

The flux paste ensures a clean surface for the solder.

3

Heat the fitting.

Use a handheld propane torch to heat the fitting. Just don't get it so hot that you can't hold it any more.

4

Melt the flux paste so that it flows into and fills the joint.

Finally, using the torch, melt the flux paste so that it flows into and fills the joint between the pipe and the fitting.

Comments (4)

  1. Posted by Brian
    Shouldnt the last step be melt solder so that is drawn into the joint evenly?
  2. Posted by Mike
    Thats why its called DUMMIES.COM Brian!
  3. Posted by john smithy
    This is hilarious. Forgot the most important part.
  4. Posted by Daryl
    I guess they're hoping that the final, final step is self explanitory, but if I hadn't done this once before then I would be very up set when I turned the water on and saw leaks throughout my entire project.

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