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In a multi-storied building, the type of plumbing system suitable for reusing the sullage for nonpotable use is
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- single stack system
- partially ventilated single stack system
- one pipe system
- two pipe system
Correct Option: D
In two pipe system, the soil water (containing human waste) and waste water (Containing floor water of bathroom, kitchen et c.) bot h are separated from each other in two different stacks. The soil water pipe needs to be connected to either main municipal sewer connection or need to be disposed of in septic tank near the site. The waste water however, can be treated, recycled on site by various techniques and can be used for non-potable uses like gardening, flushing, etc.
