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Old 06-22-2012, 09:40 AM   #16
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Help! Can't desolder old pipe

Originally Posted by vintshave View Post
Can I cut brass pipe with a pipe cutter? I think it might be brass rather than copper, but I could be wrong.
It isn't brass.

two things : One already mentioned above if there is any water in the piping at all, the heat will draw the water toward the joint, and it won't get hot enough.

If you OVER heat the fitting, it's almost like you can't even see the solder turn soft, the pipe will expand inside the fitting, and it will never come out.


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Old 06-22-2012, 09:57 AM   #17
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Help! Can't desolder old pipe

Originally Posted by Daniel Holzman View Post
I had a similar setup in my house. I would cut the copper using a tubing cutter or a sawzall if you are careful about 18 inches above where it meets the drain. I used a Fernco coupling to connect to schedule 40 PVC, which is my material of choice for drainage pipe. Rebuild the entire drain from the stub (the 18 inches of pipe you leave) up. This will give you the opportunity to install a cleanout and a trap. Your wife will love you, and of course you will have the opportunity to easily clean out the pipe should your wife decide to put something untowards down the drain (don't ask me how I know about this particular issue). By the way, you can sell the copper for scrap at $2.50 a lb and make back most of the cost of the project.
Where would you suggest installing the cleanout and trap? Pictures of what you recommend would be great!
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Old 06-22-2012, 10:00 AM   #18
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Help! Can't desolder old pipe

You stated that you were using a "blowtorch". A bit more specifics as to what type of "blowtorch" you were using. It would be possible that your torch would not heat this joint hot enough. I have had situations where a small LP gas torch would not get the joint hot enough and had to change to MAP gas.
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Old 06-22-2012, 10:31 AM   #19
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Help! Can't desolder old pipe

Originally Posted by vintshave View Post
SO if you are looking at the last picture, which is where it meets the drain, there isnt 18" of pipe on the vertical piece. Are you suggesting that I cut the pipe on the horizontal section, install a fernco there and run 40 PVC from there to an elbow and then up to the kitchen?
Just cut it somewhere between the second and third picture, giving yourself room to rebuild back with whatever you choose. Don't cut the elbow, cut away from it far enough to couple to the old pipe and get another elbow in place.


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