Davey DT22G Submersible Grinder Pump




Davey submersible Grinder pumps consist of a solids handling grinder inlet with a high head open impeller to pump wastewater containing soft solids in suspension. Suitable applications include grey and black water pumping, sump emptying, septic effluent and raw sewage disposal, and pumping wastewater with soft solids in suspension.


  • Grey and black water pumping
  • Sump emptying.
  • Septic effluent
  • Sewage disposal
  • Wastewater with soft solids in suspension.


  • Able to pump soft organic solids, sanitary products, thin rubber products and even some textiles in suspension, by shredding to a slurry
  • Open impeller prevents blockage of the pump by small solids in the slurry
  • High heads and small solids allow connection to small discharge pipe systems, especially suited to pumping waste water to pressure sewer mains
  • Silent operation
  • Quick and easy installation
  • Hose tail supplied with every pump
  • Low maintenance
  • Fully repairable
  • Mounting feet with rubber cushions fitted for a firm and stable positioning during installation and operation for D75G/GA, DT08G, D120G/A, D150G/A, DT12G & DT15G.
  • Adaptable to slide rails – see accessories


  • Heavy duty shredding and grinding ring at inlet
  • Centrifugal design, open impeller
  • Double Mechanical shaft seal in oil bath
  • Hard faced Silicon Carbide/Ceramic seal on pump side
  • Sand slinger lip seal for added protection
  • Oring casing sealing
  • Corrosive resistant stainless steel and quality heavy duty powder coated cast iron pump parts


  • 2 pole, 2900rpm 50Hz 240V single phase or 415V three phase
  • Submersible with IPx8 enclosure
  • Class F insulation
  • 10 metre HO7RN-F oil resistant power lead and seal sensor lead fitted with bared wire lead ends for easy connection to power supply terminations
  • Seal sensor leads fitted for easy connection to a protection relay to enable timely repairs prior to motor damage. Not fitted to D75G/GA or DT08G models
  • Protected against both high operating temperatures and high current by a built in automatically resetting thermal overload



Capacities to 290 lpm
Maximum total head 38m
Maximum submergence 20m
Maximum pumped water temperature 40º C



Impeller Cast iron - FCD 400
Shredding ring High Chromium steel
Grinding ring High Chromium steel
Pump casing Cast iron - FCD 400
Outlet Cast iron - FC200
Shaft seal – pump side
Shaft seal – pump side
Silicon carbide / ceramic Carbon / ceramic
Mechanical seals in captive oil bath and oil seal
Shaft seal elastomer Nitrile rubber
Pump shaft 304 stainless steel
O-rings Nitrile rubber
Motor shell 304 stainless steel
Fasteners 304 stainless steel
Float and power supply leads HO7RN-F oil resistant



D75G/GA D120G/GA D150G/GA DT08G DT12G DT15G DT22G DT37G
Electrical lead 10m 10m 10m 10m 10m 10m 10m 10m
Phase Single Single Single Three Three Three Three Three
Volts 220-240 220-240 220-240 380-415 380-415 380-415 380-415 380-415
kW (nameplate) 0.75 1.20 1.50 0.75 1.20 1.50 2.20 3.70
Amps – FL 7.50 10.00 13.00 1.90 2.30 3.00 4.50 7.90
Insulation F class F class F class F class F class F class F class F class



Sewage or “Grey Water” of neutral pH containing up to 20% soft organic solids (some wear should be expected while pumping hard solids in suspension)


Do not use this product for recirculating or filtering swimming pools, spas, etc. While these pumps are built to high safety standards, they are not approved for installations where people will be in the water while they are operating.

Do not pump abrasive materials. Sand and grit in the water being pumped will accelerate wear, causing shortened pump life.

Make room for the float switch to operate. Automatic models have a float switch to turn them on when the water level rises and turn them off again when it has been pumped down to the safe operating level of the pump. If the float switch is not free to rise and fall, correct pump operation may not be possible.

Don’t run your pump dry. Non-automatic models must be switched off manually or by way of an external float/level switch when the water level is reduced to the top of the pump housing.



Davey DT22G Submersible Grinder Pump Davey DT22G Submersible Grinder Pump Brochure