straight lining
n.— «Although the city sometimes pulls meters to thwart the most egregious offenders, these water thieves use a method called straight lining to keep the water running. They insert a pipe that taps into the supply line, and the water flows again, leaving the city no way to record gallons used.» —“Water theft: Meter tampering on the rise” by Fred Afflerbach Temple Daily Telegram (Temple, Texas) Aug. 15, 2009. (source: Double-Tongued Dictionary)