blow-off water

基本解释

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。
ip.com
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。
ip.com
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.
直管排污管的排污阻力小，旋流喷嘴、扇形喷嘴的冲洗面积大、水压高、用水量小。
ip.com