domestic tank

例句：

1. 1.The domestic tank is filled with clean water for the whole family.
   家庭水箱里装满了干净的水供全家使用。
2. 2. The domestic tank needs to be cleaned regularly to prevent contamination.
   家庭水箱需要定期清洗以防止污染。
3. 3.The domestic tank was designed to store rainwater for later use.
   家庭水箱被设计用来储存雨水以备后用。