noun
water pipe; water main
Refers to a pipe that conveys water, especially in a municipal supply system. Often used in technical or infrastructure contexts.
地震で送水管が破裂した。
The water main burst in the earthquake.
新しい送水管を敷設する工事が始
Construction to lay new water pipes has begun.
排水管 is a drain pipe or waste pipe, whereas 送水管 is for supplying water.
Compound of 送水 (sōsui, 'water supply') and 管 (kan, 'pipe').