... dredge function together, which can run as a clean water self-priming pump without any other valve and can also absorb ... to use, move, install and maintain and runs smoothly., ZWL Self priming pumpCategorySelf-priming pumpWorking Air Humidity≤50°CMedium Temperature≤80 ... pump, 2-13 for stainless steel pumpMedium Density≤1240kg/m³Self suction height≤4.5--5.5mSuction pipe length≤10mMain usageSewage ...