The Collaborative International Dictionary of English v.0.48:

Plumbery \Plumb"er*y\, n. [F. plomberie.]
   1. The business of a plumber. [Obs.]
      [1913 Webster]

   2. A place where plumbing is carried on; lead works.
      [1913 Webster]

WordNet (r) 3.0 (2006):

plumbery
    n 1: the occupation of a plumber (installing and repairing pipes
         and fixtures for water or gas or sewage in a building)
         [syn: plumbing, plumbery]