penstock

Etymology
Perhaps from +.

Noun

 * 1) A sluice or pipe which allows the controlled flow of water from behind a dam, typically routing it to a turbine of a power plant.
 * 2) The barrel of a wooden pump.
 * 1) The barrel of a wooden pump.

Translations

 * Arabic: بربخ - أنبوب مفرِّغ
 * Bulgarian:
 * Finnish: tulokanava
 * French: conduite forcée
 * German: Druckrohrleitung