Slurry Pump not drain causes and treatment methods are as follows:

     Inadequate irrigation Slurry Pump (not drained or gas Slurry Pump), should be re-prime the Slurry Pump before starting to Slurry Pump exhaust gas chamber.
     Slurry Pump turn right, check the direction of rotation, the arrow on the Slurry Pump should rotate.
     Slurry Pump speed is too low. Approach is to check the speed, the speed increase Slurry Pump.
     Filter is clogged, the bottom valve is not working. Check the filter processing method is to eliminate debris.
     Suction height too high, or vacuum suction tank. Approach is to reduce the suction height; checking suction tank pressure.