受じゅ水すい槽そう

noun

water receiving tank; cistern

A tank that receives and stores water, often part of a building's water supply system.

• マンションの受じゅ水すい槽そうは定てい期き的てきに清せい掃そうが必ひつ要ようです。

  The apartment building's water receiving tank needs regular cleaning.