After being filtered, the rain water flows into a water-purifying pipe 50 and is discharged by a blow-off pipe 20 connected with the water-purifying pipe.
雨水经过过滤后流入净水管中50，再通过和净水管连接的放水管20排出。
2
Moreover, as the blow-off pipe below the heat preservation water tank is arranged at the lowest point thereof, deposited sludge can be discharged easily.
保温水箱下方排污管设在保温水箱最低点，沉淀污泥较易排出。
3
The straight blow-off pipe has less blow-off resistance, the flushing area of the swirl nozzles and the fan nozzles is large, the water pressure is high, and the water consumption is less.