Separate drainage

Ground floor not sharing with the upper floors; washing machine, floor drains + WC lavabo, kitchen - each type has its own pipe running straight to the manhole; toilet pipes, floor drain / lavabo / kitchen pipes and rain pipes run separately, not merged. Divided into 3 types: toilet water, domestic water, rain + yard water - each floor has 3 separate lines, leading to the city drain pipe, not joined into one main pipe.