Davey D42AB Submersible High Pressure Drainage Pump

D42A B



The range of submersible High Pressure Drainage pumps are specialty pumps that are designed with superior reliability in mind for rainwater tanks, and suitable for pumping drinking water with a neutral pH.

Using an automatic float, it detects when water is available. Primarily used with rainwater tanks, it's also used for lawn and garden irrigation, treated effluent disposal and water transfer from wells.


  • Non-potable rainwater applications
  • Lawn and garden irrigation
  • Sump emptying to higher heads
  • Treated effluent disposal
  • Water transfer from wells

Submersible sump pump with two and three impeller designs for higher pressure, up to 45m head.



Double mechanical seal, one in oil bath on motor and extra mechanical seal on pump

  • Superior reliability
  • Long service life

Corrosion resistant 304 stainless steel shaft, motor shell and fasteners.

  • Long service life

Cast 316 stainless steel motor caps and super tough engineered thermo plastic pump casing.

  • Outstanding corrosion resistance
  • Long life

Centrifugal multistage 2 and 3 impeller designs

  • Higher pressures and increased efficiency

Closed vane impellers with long engagement “D” drives

  • Positive operation
  • Long service life

Patented independently floating neck rings

  • Outstanding pump performance
  • Long pump life

Corrosion resistant hard wearing polycarbonate impellers

  • Long service life

Corrosion resistant stainless steel fine mesh suction strainer with large surface area

  • Prevents blockages of the pump by solids

In-built automatic thermal overload

  • Protects the motor in the event of blockage or voltage supply problems

HO7RNF oil resistant leads, 10 metres long with 3 pin power plug

  • Easy to connect to power supply
  • Longer life in dirty water



D42A/B D53A/B
Capacities to 120 lpm 130 lpm
Maximum total head 32m 45m
Maximum submergence 12m 12m
Maximum pumped water temperature 40ºC 40ºC
Maximum soft solids 1.9mm O.D. 1.9mm O.D.
Outlet size (BSP) 1" F 1" F



Impeller Glass filled polycarbonate
Lock nut 304 stainless stee
Pump casing Glass filled polycarbonate
Diffuser and blanking ring Glass filled noryl
Mechanical seal – pump Carbon / ceramic
Mechanical seal – motor Silicon carbide / ceramic oil in bath
Shaft seal elastomer Nitrile rubber
Pump shaft 304 stainless steel
O-rings Nitrile rubber
Motor shell 304 stainless steel
Bottom bearing housing Cast 316 stainless steel
Upper motor cover Cast 316 stainless steel
Handle 304 stainless stee
Fasteners 304 stainless stee
Float and power supply leads HO7RN-F oil resistant



Type D42A/B D53A/B
Supply voltage 220-240V 220-240V
Supply frequency 50Hz single phase 50Hz single phase
Speed 2 pole, 2850rpm 2 pole, 2850rpm
Full load current (Run) 4.3A 5.7A
Locked rotor current (Start) 14A 14A
Input power (P1) 1.00kW 1.31kW
Output power (P2) 0.60kW 0.84kW
IP rating X8 X8
Insulation class Class F Class F
Starting P.S.C. P.S.C.
Lead 10m long 10m long



Use a rope to position and retrieve the pump. Do not lower or retrieve the pump using the power lead as this may damage the cable entry seals, causing water leaks and unsafe operation.

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

Keep your pump clean, particularly in situations where lint, hair or fibrous materials may get bound around the pump shaft. Regular inspection and cleaning will extend 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.

Do not 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 D42A/B Submersible High Pressure Drainage Pump Davey D42A/B Submersible High Pressure Drainage Pump Brochure