(206) 949-5683, Top Rated Plumber, Seattle
Results 1 to 6 of 6

Thread: Lead & no-lead solder compatibility

  1. #1
    Aspiring Old Fart, EE, computer & networking geek Mikey's Avatar
    Join Date
    Nov 2005
    Location
    Central Florida
    Posts
    2,686

    Default Lead & no-lead solder compatibility

    I've got to reconfigure some old copper plumbing that was installed in the 70s, so almost certainly were assembled with leaded solder. It will be fairly easy to unsweat the old fittings, wipe the pipes and fittings that are staying in place, and sweat on the new stuff, but I'm wondering if today's unleaded solder will flow and mate with the old solder film left on the pipes. Planning on using Oatey #5 flux. It is almost impossible to cut the pipes back to clean copper.

  2. #2
    Commercial Plumber markts30's Avatar
    Join Date
    Sep 2006
    Location
    Phoenix, AZ
    Posts
    630

    Default

    I don't know if the old style solder would mix compatably with the new...
    I probably would spend the time with a file and sand cloth to clean all the old solder off the old pipes and have a nice clean new surface to solder on with the 95/5...

  3. #3
    Forum Admin, Expert Plumber Terry's Avatar
    Join Date
    Aug 2004
    Location
    Bothell, Washington
    Posts
    14,202
    Blog Entries
    1

    Default

    No lead solder will mix fine.
    I've pulled many fittings apart from the 70's and resoldered using "No-Lead".

    My favorite solder is Bridgit

  4. #4
    DIY Senior Member Marlin336's Avatar
    Join Date
    Aug 2007
    Location
    Suffolk, NY
    Posts
    187

    Default

    I agree with terry. I've pulled apart and re-soldered many old lines, I never even thought about the mixing lead/no lead thing until now.

  5. #5
    Master Plumber Redwood's Avatar
    Join Date
    Dec 2007
    Location
    Connecticut
    Posts
    7,463

    Default

    Me agrees too!

  6. #6
    Plumber Cass's Avatar
    Join Date
    Nov 2005
    Location
    Ohio
    Posts
    5,984

    Default

    The old lead will come off the pipe very easy with a little sanding cloth and a new fitting will insure that all the old lead is totally gone.

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •