400LPM = 6.6LPS at 12m head Pentax Bore Pump 4S400-08


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Pentax 400LPM Bore Pump and Franklin motor assembly.

Assembly includes pump, motor & starter.

4-Inch Bore Pump and Motor Kit.
24m³/h flow ratings
400 liters per min / 6.6 liter per second @ 12m head

***NoteEven though this pump is rated at 400LPM, this is its maximum flow.
This pump operates best at:
350LPM @ 17m head
300LPM @ 24m head
250LPM @ 30m head

The 4S400-08 has a 2.2kw/3hp 3-wire motor.
The 3-wire 1 phase require a starter box which comes standard when you buy this combination.

There are other accessories that you will need to 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
This model has a 2 (50mm) discharge thread, so if you are using 32mm pipe diameter then a 2″ Bore Cap would be recommended.

Shroud Adapter
A shroud adapter is only needed if you are installing a 4″ pump down 6″ or larger casing.
If using 50mm pipe diameter then a 50 x 100mm (2″ riser) PVC Shroud Adapter would be recommended.

Electrical Cable
The info below is a guide only, you must check with your electrician on cable size.
1 Phase Cable (3-wire/4 core) – 1.5mm sq cable up to 20m, 2.5mm sq cable up to 40m, 4mm sq cable up to 60m, 6mm sq cable up to 100m
Always check with your electrician. 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 0-800 kPa, 0-1000 kPa, 0-1600 kPa and 0-2500 kPa

Flexible Riser Pipe
– Series 100 is for depths up to 100. The sizes are 32 mm and 50 mm 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, joiners and installation roller.

Single 1 Phase Motor Protection
If you purchase a single phase 3-wire kit, then you will need a Pumptec Plus as your motor protection device.

2 Year Warranty

Additional information

Litres Per Minute




kW / Hp

2.2 / 3


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