FlushWave is a compact automated system collecting, filtering and disinfecting greywater from sinks, bath tubes. 100 persons spent about 1000 m³ of fresh water sinks per year. That water can be reused in toilets or for other purpose. FlushWave team has developed simple, self-cleaning system with oxygen generator which does not require service. Business model based on B2B solution directed to public institution, governments, transport stations, airports, restaurants and business centers. Using FlushWave enables saving of water and money.