So I have this pretty large-size (water) pipe that runs to my house. A couple of years ago I had some guys run a smaller pipe from that "large-size" pipe to my barn. Well, my question is this: what do you call the smaller pipe that splits off the larger pipe and runs to the barn? I know that the first (larger) pipe is called the "main" (if I am not mistaken), but I have totally forgotten what the second (smaller) pipe is called, but I do know that there is a name for it.

  • No, it's some other word. But I do know for sure that there is a word for it out there. I just can't remember it.
    – user74809
    May 16, 2016 at 7:51
  • Auxiliary pipe? May 16, 2016 at 7:52
  • No, not "auxiliary pipe" (even though it totally seems to fit the bill, it's not the word I am looking for) . They called it by some other name , I think. I live in North England, by the way. They didn't call it a "service pipe" either...
    – user74809
    May 16, 2016 at 8:02
  • Keep these mind, I just found what they called it in the second picture in the link you provided. It's a branch pipe. Thanks a lot. It really bugged me for a while.
    – user74809
    May 16, 2016 at 8:07
  • main and service lines; main and offtake pipes; Look here: city.milwaukee.gov/ImageLibrary/Groups/WaterWorks/files/…
    – Kris
    May 16, 2016 at 8:23

1 Answer 1


United Utilities seem to call this a 'branch pipe'.

enter image description here

  • Well, this is what the guys who ran that pipe called it...
    – user74809
    May 16, 2016 at 8:17

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