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By using greywater systems to reuse drained wash water to flush [[toilet]]s or to water lawns and [[garden]]s, we can halve the water use of most residential buildings. | By using greywater systems to reuse drained wash water to flush [[toilet]]s or to water lawns and [[garden]]s, we can halve the water use of most residential buildings. | ||
Greywater systems | Greywater systems however require the purchase of a sump, greywater pressurization pump and secondary [[plumbing]]. | ||
== Suggested projects == | == Suggested projects == |