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Specification options
Domestic rainwater recycling Capital cost Net present value
Ìý£/³¾2for 60 years £/³¾2
Conventional system; utility supply for all water use and stormwater drains for disposal1,275 10,980
Rainwater harvesting system – underground tank, partial mains water use, utility stormwater drainage 3,825 10,700
Rainwater harvesting system – above-ground tank, partial mains water use, utility stormwater drainage 3,585 10,870
Rainwater harvesting system – underground tank, partial mains water use, soakaway for stormwater drainage 4,375 10,520