Which of the following are sources of graywater ? (Choose 2)

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试卷: LEED v4 GA模拟题C卷[查看]
Which of the following are sources of graywater ? (Choose 2)
A: Washing machines
B: Municipal potable water supply systems
C: Wells
D: Showers
E: Toilets

参考答案: AD

本题解释:
正确答案：A D
系统解析: A:This is usually classified as graywater depending on local code.

D:Shower water that goes down the drain is then classified as graywater, depending on local code.

B:This is potable water, just like it says.

C:Well water is usually potable water.

E:Toilet water that is flushed becomes blackwater.

Notes:

Graywater is water from laundry machines or showers that is not suitable for drinking, but can be used for other purposes such as irrigation and flushing toilets.

Graywater is defined by the Uniform Plumbing Code (UPS) as untreated house-hold wastewater which has not come into contact with toilet waste or kitchen sinks.

Some states and local codes have other definitions.