<Dl> <Dd> "Dead leg" redirects here; in engineering, a "dead leg" is a redundant length of pipe through which flow is impossible because one end is sealed . </Dd> </Dl> <Dd> "Dead leg" redirects here; in engineering, a "dead leg" is a redundant length of pipe through which flow is impossible because one end is sealed . </Dd>

What is the origin of the phrase charlie horse