suction pipe

from The Collaborative International Dictionary of English v.0.48

Suction \Suc"tion\, n. [L. sugere, suctum, to suck; cf. OF.
   suction. See {Suck}, v. t.]
   The act or process of sucking; the act of drawing, as fluids,
   by exhausting the air.
   [1913 Webster]

   {Suction chamber}, the chamber of a pump into which the
      suction pipe delivers.

   {Suction pipe}, {Suction valve}, the induction pipe, and
      induction valve, of a pump, respectively.

   {Suction pump}, the common pump, in which the water is raised
      into the barrel by atmospheric pressure. See Illust. of
      {Pump}.
      [1913 Webster]