\( WH_{upl} \;=\; \dfrac{ a \cdot v }{ g }\) (Water Hammer Upstream Pipe Length)
\( a \;=\; \dfrac{ WH_{upl} \cdot g }{ v }\)
\( v \;=\; \dfrac{ WH_{upl} \cdot g }{ a }\)
\( g \;=\; \dfrac{ a \cdot v }{ WH_{upl} }\)