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drop headers

Steve_210 Member Posts: 594
i have read the section on drop headers in systems FAQ and i wondered where i could find more info or better yet pictures. they make perfect sense and i would like to start using them but do'nt want to make any silly mistakes. thanks for any help.   


  • Steamhead
    Steamhead Member Posts: 14,863
    Click Resources above

    then Library, then Steam Piping. You'll find a whole slew of drop header pics.

    "It pays to wander off the wall"

                                                                    - Dan Holohan's quote
    All Steamed Up, Inc.
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
  • Steve_210
    Steve_210 Member Posts: 594
    thank you

    thank you so much steamhead this is exactly what i was looking for, just did not know where to look.
  • Marcellino
    Marcellino Member Posts: 1
    edited December 2009
    regarding drop headers

    What are the benefits of  drop headers,never used this piping method.could you tell me the important rules of thumb...24" above wl,is amount of drop important?
  • Benefits of a Dropheader

    There are quite a few benefits to using a dropheader. The ones that come immediately to mind are:

    1. The riser connections, with the double elbows to the header, make a fully swing universal swing joint. These universals allow the boiler and header to thermally expand independently without putting pressure on each other. 

    2. These universals make it much easier to connect the header to the boiler. They also  adjust for slightly short or over length piping.

    3. Using a dropheader allows you to use longer (higher) boiler exit risers which results in drier steam.

    4. From my observation most of the pros still use the "24 inch above the waterline to the bottom of the header rule" with the dropheader. However, since this measurement really pertains to the height of the exit risers above the waterline, you could set the header lower if it helps with the lead on the steam riser(s) from the header to the main(s).

    Here are some more opinions on dropheaders:
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