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sweating copper
On 2/6/2012 3:22 PM, teabird wrote:
Hello, I have some 1/2 inch type M copper pipe and 4 90* elbows that I'm sweating together for practice. I've cut some 8 inch pieces and yesterday was able to solder one end of each ell to 2 tubes. It took a few extra tries but I was able to draw the solder into the joint pretty well. There was alot of smoke created, white and brown. I'm using yellow canister (Map gas?), cleaning the joints with emery cloth, flux and using lead free solder. Today I can't seem to get the solder to draw in. I've prepared the joints as before and am attempting to create a square with the tubes so this time the ell is connected to 2x 8 inch pieces. I also notice that even though the solder is eventually melting it is not drawing in the joint, and when it hardens it has a yellow color to it. Is the yellow color significant and does it indicate a problem with my technique? Can there be a noticable difference between yesterday and today as relates to how quickly the joint heats up, as today I have 2x the amount of tube to heat? TIA, Teabird When using lead free solder on copper water pipe, I've found the paste flux that contains powdered lead free solder the best thing to use. I get a good joint every time. You can buy small containers of Oatey #95 lead free tinning flux at Lowe's and Home Depot. http://preview.tinyurl.com/7u5luql TDD |
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