Sweating new valve

Discussion in 'Shower & Bathtub Forum & Blog' started by Pimbley, Jul 17, 2007.

  1. Pimbley

    Pimbley New Member

    Messages:
    20
    I'm about to install my new valve (American Standard, Pressure Balance).

    All the ports are threaded so those are straightforward.

    But, when I sweat the nearby copper tubes to connect to incoming supply, elbows etc., how worried should I be about getting the valve hot. I do not want to take the valve apart just to sweat near it.

    Do people use heat sinks or other means to stop the valve overheating and , I assume, seals getting damaged. Is this common anyway?

    Thanks in advance!
  2. jimbo

    jimbo Plumber

    Messages:
    8,997
    Location:
    San Diego
    If you are sweating a fitting an inch or more away from the valve, it is probably quite safe. There are plumbers who are so good with their soldering technique that they can sweat a valve body without removing the cartridge. The secret is rapid heating of the joint for a very short time. The valve body has enough mass to dissipate the total heat applied. I do not do it or recommend it.
    The longer the heat is applied with the torch, the more total heat the valve body must dissispate, and it will likely rise to a too-high temp.

    It is a simple matter to remove the parts, but as I mentioned, if your are an inch or more away, and for extra measure wrap a damp rag around the central body, you will be fine.
  3. Pimbley

    Pimbley New Member

    Messages:
    20
    Sweating - thx

    Thanks. I should be - or can make sure I am - 1" + away. Will also use the damp rag trick.

    Thx.

    Pimbley
  4. statjunk

    statjunk DIY Senior Member

    Messages:
    542
    I've never had a problem soldering valves like that. Use the hottest part of your torch and they go quick.

    Tom
  5. Terry

    Terry Administrator Staff Member

    Messages:
    15,443
    Location:
    Bothell, Washington
    I pull the insides and solder.
    It does't take that much time, and then I don't have to worry about it.

    I used to solder with the guts intact years ago, before there were so many plastic parts.
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