OK to sweat a threaded valve connection?

Discussion in 'Shower & Bathtub Forum & Blog' started by orandennison, Jun 12, 2005.

  1. orandennison

    orandennison New Member

    Hi, I'm in the process of installing a new Kohler rite-temp valve in my shower, and I'm having some trouble with leaks on the threaded connections to the hot and cold water supply pipes. I've tried a couple times so far using 2-3 wraps teflon tape as a thread sealant, and I've really tightened the connections down- but both times the connections have failed a leak test when I reapplied water pressure to the system.

    I'm starting to get pretty fed up with this, and I started thinking- couldn't I just sweat these connections? I haven't ever seen someone solder a threaded connection before, but it seems like it would work. The installation manual doesn't specifically say anything about sweating the water intake connections, but it does say to disassemble the valve and remove certain parts to protect them from heat if I solder on the valve, so I'm guessing it's ok.. right? Any tips or suggestions would be greatly appreciated. What would you do in this situation? Sweat a threaded connection, or should I try something different first? Thanks!
  2. RioHyde

    RioHyde Plumber

    Cincinnati, Ohio
    Are these male threads on the valve body? If so, they are made to connect with either female adapters or 1/2" copper that will slip into them. If they are female threads then you can flux the female threads of the valve body and the male threads of your adapter and solder them after removing the plastic components of the faucet. If you dont really want to solder the connections try using 4-5 wraps of teflon tape and a coating of pipe dope.
  3. Terry

    Terry Administrator Staff Member

    Bothell, Washington
    The Kohler valve has two options.

    With that valve, you can either use the FA fittings and thread over the ends.
    or you can insert a pipe inside the ends and solder it.
    If you use pipe, remember to flux it.
  4. orandennison

    orandennison New Member

    it worked

    Thanks Terry and RioHyde for your suggestions! It didn't even occur to me that pipe could be inserted into the ends there. Before I tried soldering it I decided to give it one more shot and tried RioHyde's suggestion of 4-5 wraps of tape and pipe dope. Bingo- no leaks! Phew, it's a relief to have this project finally finished. Thanks again, and thanks for the great forum Terry.
Similar Threads: sweat threaded
Forum Title Date
Shower & Bathtub Forum & Blog Sweat connections near Moen Exacttemp valves May 5, 2010
Shower & Bathtub Forum & Blog Bath spout rough-in/Nipple or Sweat Sep 8, 2009
Shower & Bathtub Forum & Blog Sweating tip Jul 26, 2007
Shower & Bathtub Forum & Blog Sweating new valve Jul 17, 2007
Shower & Bathtub Forum & Blog No Room to Sweat Feb 8, 2007

Share This Page