Solder supply lines to valve or use threaded?

Discussion in 'Shower & Bathtub Forum & Blog' started by johngaul, Nov 14, 2007.

  1. johngaul

    johngaul New Member

    Nov 5, 2007
    Installing a Delta R18222 shower valve in master bath. Both the outputs are solder connections, yet the inputs are threaded. Shouldn't I solder these as well since they will be enclosed?
  2. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Sep 2, 2004
    Retired Systems engineer for defense industry.
    New England
    Most of those valves will allow either a threaded connection, or you can slide the pipe into the opening and solder it there. If you remove the cartridge and clean and flux the pieces, a soldered connection is probably better. Either one can work if done right, though. Don't solder a threaded connection since, if you ever do want to disassemble it, it will be a major pain.
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