"Water recycling" refers to the process of treating used or waste water so it can be used again for various purposes instead of being discarded. Full definition
More and more buildings started to feature eco-friendly technologies such as water recycling systems, solar panels, heat pumps and wind turbines. (techtimes.com)
We are looking into grey water recycling and alternative fuels. (greenrvlife.com)
They have a few other sustainability projects already going on there, like a grey and black water recycled program designed to reduced household water consumption by 50 %. (treehugger.com)