Sweating Vertical pipe


Old 03-03-09, 10:56 PM
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Sweating Vertical pipe

Will be doing this this weekend. Will the solder draw up into the joint?
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Old 03-04-09, 01:32 AM
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Here is the best way to solder up-hill...

Make sure the fittings and pipe are cleaned with sandpaper or scratch cloth. Then coat the outside of the pipe, and the inside of the fitting with a light coating of soldering flux. I recommend not using tinning flux for this procedure.
Connect fittings and pipe together

Start heating the first vertical joint keeping the heat on and around the fitting, not the pipe. Once the flux starts to run down the pipe, gently wipe it with a soft rag. Then place the heat back onto the fitting and re-heat to soldering temp. If there is lots of flux still running, wipe a second time before soldering, while keeping the fitting up to temp. Add solder to the joint gingerly, touching only the joint. the solder should suck right up into the joint. Be careful not to add too much solder so it does not run down the pipe. wipe excess flux and solder gently while hot. inspect for any parts of the joint missing solder. Touch up as needed.

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