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80LPM – 1.33LPS at 87m head Pentax Bore Pump – 3-wire 1 Phase – 4S100-27


4S100-27 Pentax 3-wire 1 phase 3hp / 2.2kw Bore Pump


Pentax 4 Inch Bore Pump with Franklin Electric motor assembly.

Assembly includes pump, motor & starter/control box.

100 liters per min 1.66 liters per second @ 35m head
90 liters per min 1.50 liters per second @ 61m head
80 liters per min 1.33 liters per second @ 87m head
70 liters per min 1.16 liters per second @ 109m head
60 liters per min 1.00 liters per second @ 127m head
50 liters per min 0.83 liters per second @ 141m head
45 liters per min 0.75 liters per second @ 147m head
40 liters per min 0.66 liters per second @ 152m head
35 liters per min 0.58 liters per second @ 157m head
25 liters per min 0.41 liters per second @ 164m head
0 liters per min 0.00 liters per second @ 175m head

This 4S100-27 has a 2.2kw / 3hp 3-wire 1 Phase Franklin Electric motor.
The 3-wire 1 phase motor does require a starter box which is included.

There are other bore pump accessories that you will need when you install your bore pump which include bore cap, drop cable, support cable, riser pipe, pressure gauge, etc.  These are listed below

Please be sure that your pump and accessory selection is correct before you purchase as the onus is on you. This is why I have included suggestions below with links, to ensure you select the correct size accessories for this model pump.

Options to purchase with your kit to suit this pump

Bore Cap

Bore Caps are available with different size discharge threads.  Your pipe and adaptor size is what will determine what size discharge thread it will need to connect with. Please keep this in mind when selecting your bore cap.

Splice Kit

The splice kit is used to join the motor cable to the electrical drop cable. The splice kit makes a waterproof join

Pump Shroud

A pump shroud is needed to cool the motor and is only required if you are installing a 4 inch pump down 6 inch or larger casing. A shroud or shroud adaptor is also available on this site.

Electrical Cable
1 Phase Cable 3-wire/4 core submersible drop cable is required. However, you must check with your electrician on cable size. He will do volt drop calculations to meet site requirements to comply with AS.

Stainless Steel Support Cable – Available in 3mm cable or 4mm cable.

Stainless Steel Support Cable Grips/Clamps – Available in 3mm or 4mm to suit S/S Cable.

Pressure Gauges Liquid Filled 63mm – Available in 0-800kPa, 0-1000kPa, 0-1600kPa & 0-2500kPa pressure ratings.

Flexible Riser Pipe
– Series 100 is for depths up to 100.The sizes are 32mm and 50mm internal diameter.
– Series 200 is for depths up to 250m. The sizes range from 40mm to 200mm internal diameter.
– As well as the couplings, ties and joiners.

Installation Roller
The installation roller is a device that fits on the top of the bore casing.  The rollers make it easy to lift and lower the bore pump down the borehole.

Single Phase Motor Protection
The motor protection device for a 3-wire bore pump motor is the Franklin Pumptec Plus.


There is a 2 year warranty with the Pentax bore pumps and Franklin Electric motors.

More Information

Motor Size 2.2kw / 3hp
Phase Single 1 Phase 3-wire
Rated Flow (LPM) 80
Size 4″ Inch
Discharge (mm) 32mm – 1.25″
Brand Pentax
Warranty Period 2 Years