solder not taking to copper


  #1  
Old 12-24-06, 03:42 AM
O
Member
Thread Starter
Join Date: Dec 2006
Location: usa
Posts: 18
Upvotes: 0
Received 0 Upvotes on 0 Posts
solder not taking to copper

In advance, excuse my ignorance- this is a whole new ballgame to me!
My buddy and I are renovating an old (1958) single story crawlspace house that I purchased for my family. He is showing me how to solder, and we installed a new water heater and are in the process of replacing all of the old fixtures and valves inside and outside of the house.
We have come across a 1/2" copper pipe on the house that is not taking the solder. It is being thoroughly cleaned and fluxed, but when the right temperature is reached the solder balls up and rolls off and is not being wicked into the join.
Why would this happen? All of the other pipes have sucked up the solder just fine. Any ideas why this would happen?
Thanks in advance-
OldFrenchy
 
  #2  
Old 12-24-06, 04:37 AM
mattison's Avatar
Member
Join Date: Mar 2003
Location: Cinti, OH
Posts: 5,315
Upvotes: 0
Received 1 Upvote on 1 Post
Only two things that I can think of of the joint is clean. Either you're getting it too hot or there is water in the pipe.
 
  #3  
Old 12-24-06, 06:19 AM
mango man's Avatar
Member
Join Date: May 2004
Location: Sw FL
Posts: 1,990
Upvotes: 0
Received 0 Upvotes on 0 Posts
water in the pipe , open the lowest outlet in the house to drain , in my case its a hose bib outside
 
  #4  
Old 12-24-06, 06:23 PM
notuboo's Avatar
Member
Join Date: Sep 2001
Location: Kansas City MO
Posts: 1,699
Upvotes: 0
Received 0 Upvotes on 0 Posts
I too, have ran into old red hard copper, not brass, that does what you describe. More heat is not the answer.

You need to "tin" the copper tubing. Without any fittings but just a plain, clean pipe end; flux the pipe, heat it up and then just touch the solder to the pipe. A small amount of solder 'fix' itself to the pipe and you can solder to this. You don't need it to run around and form a ball on the bottom of the pipe as this would need to be removed to get the fitting on the pipe.

After tinning the pipe, you can solder just like normal.

Hope this helps and merry xmas to everyone...
 
 

Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: