The length constructor multiplies each entered pipe length by a per-foot volume coefficient for that nominal pipe size.

\begin{equation}\label{eq:pipe-data-volume} V_i = L_i \cdot c_i \end{equation}

Symbols

\(V_i\)	Contained pipe volume for nominal size i \([\unit{ \cubicFoot}]\)
\(L_i\)	Installed pipe length for nominal size i \([\unit{ \foot}]\)
\(c_i\)	Pipe volume coefficient for nominal size i \([\unit{ \cubicFoot\per\foot}]\)