Summary: Watch as a seasoned DIYer demonstrates how to effectively apply flux to copper pipes before sweating (joining and soldering) them in this free online video about home repair.
Don Golden has been in the business of buying and remodeling homes in the Los Angeles area for over fifteen years. He has used his expertise in the areas of design, carpentry,...read more
"Hey everybody Don Golden with Expert Village and we're moving on with our copper piping. I'm going to show you now what you need to join these in everlasting matrimony. What we are going to do is we are going to use what is called flux paste. This is a water soluble product that is used whenever you are soldering. It is a kind of nasty looking pasty kind of material that once you put it on and they actually make a brush for it as well and it is available in any hardware store. You want to take your flux and run it around there until you see it turn gray again. There we go. Sometimes it turns colors when it sits around for a while but it doesn't mean it is bad. Then you are going to flux every part of this thing that is going to be soldered. You are going to flux the outside pieces. You are going to flux the inside pieces, like this, stick it in and swirl it around, make sure that you are going to get good coverage because this stuff is what makes the solder flow and harden very quickly once it heats up. Again it is water soluble so you don't have to worry about it once it seals and you have water coming through here it cleans itself out. There you go. We have got a whole bunch of flux on here. Now when we come back we are going to fit these back together and obviously when you are in the middle of the job you want to make sure that everything is fit perfectly and we are going to dry fit when we come back."
eHow Article: Applying Flux to Copper Pipes