The main drain was blocked.

主下水道被堵住了。

《柯林斯英汉双解大词典》

By adjusting main drain off water pump flow quantity, this paper makes main drain off water equip running safe, economy, saving investment.

通过调整矿井主排水泵流量，使矿井主排水设备安全经济运行，节约投。

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When SpongeBob and Patrick hear the story of The Main Drain, they try looking for it. It gets hard when everyone keeps getting in their way.

海绵宝宝和派大星听说了“总排水管”的故事，二人想找到它，但其他人总找各种理由妨碍他们。

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Fountains of water still spew forcefully from almost every drain and gulley, and the main roundabout into St Asaph from the A55 remains impassable.

BBC: Ruthin floods: Alarm raised by postman who saw river rise

Thousands of light bulbs illuminate the gigantic main terminal and unused parking lots around the clock, a massive energy and cost drain that appears to be the result of a computer system that's so sophisticated it's almost impossible to operate.

NPR: Berlin's Airport Project Delays Shame Germans