pipage

from The Century Dictionary.

• noun Conveyance or distribution by pipes, as of water, gas, petroleum, etc.
• noun The amount charged for conveyance by pipes or pipe-lines.

from the GNU version of the Collaborative International Dictionary of English.

• noun Transportation, as of petroleum oil, by means of a pipe conduit; also, the charge for such transportation.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun plumbing, a system of pipes
• noun a charge made for piping a fluid from one place to another

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a long tube made of metal or plastic that is used to carry water or oil or gas etc.
• noun a fee charged for the use of pipes