住宅厨房、卫生间下水管线的传统做法是:设座便器的卫生间,浴盆、洗脸器下各设存水弯,地漏设扣碗式水封(如图1)。设蹲便器的卫生间,浴盆、蹲便器下各设存水弯,厨房水池下设代水封的地漏(如图2)。按传统做法,厨房、卫生间的各下水器件均设水封,重复而又烦琐。厨房水池下的地 The traditional methods of residential kitchens and toilets are as follows: toilets for toilets, traps for bathtubs and sinks, and bowl-type water seals for floor drains (see Figure 1). Squat toilets, toilets, squat toilets are provided under the water traps, kitchen sinks set on behalf of the water seal floor drain (Figure 2). According to traditional practices, the water seals in the kitchens and toilets have water seals that are repeated and cumbersome. The floor under the kitchen sink