唯嘉同层排水源于欧洲，在欧洲已经比较成熟，目前在德国、意大利、荷兰等国家的建筑物70%以上都使用了先进的同层排水系统，应用已经较广泛，此种排水的方式正是因为有着众多的优点在中国也被设计院所认同，同层排水正在向一个新的高度跨越。

        同层排水系统也称墙排水，所有卫生器具的下水管不穿越楼板，坐便器采用后排水的方式，各个卫生器具从假墙里布置或沿墙、贴地布置，最终连接至排水立管的布置方式。

The same floor drainage originates from Europe and has been comparatively mature in Europe, at present the same floor drainage system has been extensively applied and advanced same floor drainage systems have been employed for more than 70% buildings in Germany, Italy and the Netherlands, etc. Because of multiple merits, such drainage way is identified by design institutes in China, and the same floor drainage is spanning towards a new height.

The same floor drainage system is also called wall drainage, in which sewer pipes of all sanitary fixtures do not pass through floorslabs, rear drainage is adopted for toilets, and all sanitary fixtures are arranged in false walls or along walls and on the ground, and finally connected to vertical pipes of drainage.