What types of water can NOT be used for flushing toilets?

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试卷: LEED GA模拟题A[查看]
What types of water can NOT be used for flushing toilets?
A: Graywater
B: Blackwater
C: Stormwater
D: Non-potable water

参考答案: B

本题解释:
Graywater is defined by the Uniform Plumbing Code (UPC) 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.

Graywater includes used water from bathtubs, showers, bathroom wash basins, and water from clothes-washer and laundry tubs.

We receive many questions on this graywater issue - does the soap from showers matter, what if someone washed diapers in the laundry - the main points to remember are 1) that the definition of graywater includes shower and laundry water; and 2) that LEED allows graywater use;Once a toilet is flushed, the water becomes blackwater. However the water cannot be cycled back for more flushing unless it has been treated first; Stormwater is a great choice for offsetting potable water use in toilet flushing if local code permits it;Non-potable water such as stormwater or graywater is a great choice for offsetting potable water use in toilet flushing if local code permits it