Check out the Zoeller YouTube Channel for tips, training, and product videos!


7020, 7021 Grinder Pumps

Grinder Pumps and Systems // Shark® Series

7020, 7021 Grinder Pumps

Progressing cavity grinder pumps

Features and Benefits


  • Sanitary sewage pumping stations
  • Pressure sewage systems
  • Commercial and residential sewage removal



  • Discharge: 1-1/4” NPT horizontal
  • Seals – Silicon Carbide/Carbon, Buna-N elastomers
  • Construction – motor housing, cover, adapter and pump housing cast iron ASTMA A-48, corrosion-resistant, powder coated epoxy finish
  • Attaching hardware – 304 stainless steel
  • Square ring and gasket – Viton
  • Stainless steel cutter and plate hardened to Rockwell C 55-60
  • Pressure relief valve
  • Stainless steel legs provide for free-standing installation
  • Stainless steel helix hydraulic rotor
  • Buna-N hydraulic stator


  • Permanent split capacitor (PSC) motor
  • Stator – Class B insulation and lead wires, Nema B design
  • Integral thermal overload protection with automatic reset
  • Housing – Finned cast iron, oil-filled
  • 416 stainless steel motor shaft
  • Upper and lower ball bearings – dual, high carbon chromium steel
  • 20' (6 m) power cord with 15 amp plug (extended cord lengths available)

Note: Product information presented here reflects conditions at time of publication. Consult factory regarding discrepancies or inconsistencies.

Product Specifications

Voltage Ability230 or 200 (2 HP Only)
Discharge Size1.25"
Solids HandlingGrinder, Slurry
HP1 & 2
SealsSilicon Carbide/Carbon
O RingsViton
ImpellerHydraulic Rotor

Technical Data


To ensure proper pump operation, a swing or flapper style check valve must be installed in the pump discharge line. A faulty or non-functional check valve when combined with a pressure may prevent the pump from starting.

Pump Performance Curves

Design Tools