Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

What is this

Options
Grega
Grega Member Posts: 20
in Radiant Heating
I have not seen a valve like this before. Can anyone help on what it is please

Comments

  • Jamie Hall
    Jamie Hall Member Posts: 23,350
    Options
    I have seen it -- can't remember what it's called. It is a specialty item which is used on hot water heat, and routes the hot water into the radiator and allow the cooled water out without mixing at the valve.
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • Grega
    Grega Member Posts: 20
    Options
    Thanks, any ideas where to get some?
  • Jamie Hall
    Jamie Hall Member Posts: 23,350
    Options
    not a clue
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • Erin Holohan Haskell
    Erin Holohan Haskell Member, Moderator, Administrator Posts: 2,310
    Options
    That looks like a Honeywell Unique valve. This valve, patented in 1907, gave the people installing hot-water heat a way to compete with the people who were installing one-pipe steam. The Unique valve allowed them to connect a hot-water radiator with just one pipe. Here's the patent: https://heatinghelp.com/heating-museum/mark-c-honeywells-patent-for-the-unique-valve/

    According to @DanHolohan in Classic Hydronics, "The Unique valve opened with a quarter turn and used a baffle to direct the water into the radiator. The cooler water flowed by the hot water and entered the Unique valve on the other side of the baffle. You control the amount of hot water going to the radiator by using the quarter-turn valve."


    President
    HeatingHelp.com

    HVACNUTSTEVEusaPArick in Alaska
  • Danny Scully
    Danny Scully Member Posts: 1,426
    edited October 2019
    Options
    It’s a Honeywell “unique” radiator valve...and you’re not getting a replacement unfortunately. I’m assuming it’s leaking?
  • DanHolohan
    DanHolohan Member, Moderator, Administrator Posts: 16,534
    Options
    What Erin said.
    Retired and loving it.
  • Grega
    Grega Member Posts: 20
    Options
    Lol...as always ...thank you very much.
  • Grega
    Grega Member Posts: 20
    Options
    Any ideas for after market products or idea?
  • DanHolohan
    DanHolohan Member, Moderator, Administrator Posts: 16,534
    Options
    There are TRVs that convert one-pipe steam to hot water using a dip tube. They work on the same principle as Unique.
    Retired and loving it.

Categories