Sump Design for Vertical Lift

The proper design of sumps for the use of vertical lift pumps or horizontal pumps taking suction from a sump is important to good suction conditions at the pump [2, 3, 14]. 

Avoid sudden changes in direction or elevation of flow closer than five bell diameters to pump. 

Avoid sump openings or projections in water path close to pump. 

Have water flowing parallel to sump walls as it enters pump. Water should enter pump suction with as low a turbulence as possible. 

Water velocity in sump must be low, 1/ feet/second is good practice. 

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