What solder to use to install zone valve?

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by grandspan, Oct 11, 2009.

  1. grandspan

    grandspan New Member

    Oct 11, 2009
    Staten Island, New York
    I have purchased a Honeywell zone valve to replace the original (same exact valve) that is stuck in open position position. I bothered to read the instructions and it says not to use silver based solder because of the high temp it takes to melt may damage the valve.

    I see that the Taramet Sterling doesn't contain silver but the MSDS sheet says that it melts at 410 degrees. Is that temp low enough? I think this is not much lower that silver solder melting point.
    Lincoln Electric has a nickel based solder "NICK" and another "SPEEDY" and I'm not sure of their melting points, these are on the Home Depot website.

    I'm not sure what to buy. Thanks for your help
    Last edited: Oct 11, 2009
  2. Terry

    Terry Administrator Staff Member

    Aug 17, 2004
    Bothell, Washington
    Taramet Sterling is mainly Tin
    About 95% TIN
    This is normally what we solder with.

    Silver solder is normally brazed at high heat, not soldered.
    Last edited: Oct 11, 2009
  3. Sponsor

    Sponsor Paid Advertisement

  4. nhmaster

    nhmaster Master Plumber

    Jul 30, 2008
    Tech. Instructor
    S. Maine
    you could use that or 50/50 because it's for heat so lead content is not a problem
  5. jimbo

    jimbo Plumber

    Aug 31, 2004
    San Diego, CA
    The melting point for eutectic tin/lead is about 363ºF. The eutectic alloy of tin lead is Sn63.

    Sn60 melts around 375ºF, and Sn50 melts at about 420ºF.

    There are many characteristics of solder which determine how it performs, how easy, how good a bond, etc. etc. It is a very complicated subject.

    Even with the higher melting points, 50/50 or 60/40 are much perferred for soldering copper tubing. The lead-free era has changed the subject completely. The eutectic alloy has applications in soldering electronic components for temperature reasons, but it is not the easiest to use. Fluxing, timing, and pre-heat of the board are all critical.
Similar Threads: solder install
Forum Title Date
Plumbing Forum, Professional & DIY Advice Water smells like soldering after softener install Mar 2, 2013
Plumbing Forum, Professional & DIY Advice Basic Soldering - Shower Installation Dec 4, 2006
Plumbing Forum, Professional & DIY Advice Replacing old soldered joints. Two plumbers gave me two different answers... Jan 16, 2021
Plumbing Forum, Professional & DIY Advice Is this fitting too loose to solder? Jan 5, 2021
Plumbing Forum, Professional & DIY Advice Failed to solder an easy joint Dec 2, 2020

Share This Page