\begin{definition}[Definition:Imperial/Volume/Pipe]
The '''pipe''' is an imperial unit of volume.
{{begin-eqn}}
{{eqn | o = 
      | r = 1
      | c = '''pipe'''
}}
{{eqn | r = 2
      | c = hogsheads
}}
{{eqn | r = 0 \cdotp 58189 \, 952
      | c = cubic metres
}}
{{eqn | r = 581 \cdotp 89952
      | c = litres
}}
{{end-eqn}}
\end{definition}