Pentax 3S 3-15 3-Inch 230v Multistage Borehole Pump

Description

The Pentax 3S 3-15 (code 022-920) is the entry model in the Pentax 3S range of 3-inch multistage borehole pumps. Its 15 impellers deliver up to 45 litres per minute and a maximum head of 46 metres from a 0.33 kW (0.5 HP) motor on 230v single-phase, through a 1″ G outlet.

It is the pump to choose for a shallow 3-inch bore where the water sits close to the surface and you only need modest pressure at ground level. At 20 l/min it gives about 36 metres of head, and at 30 l/min about 28 metres. If your water level is deeper or you want more pressure at the tap, the Pentax 3S 3-23 adds eight more impellers and reaches 70 metres.

The pump end has a stainless steel shell, pump shaft and coupling, Noryl impellers and self-lubricating polyacetal diffusers, with a 1″ G threaded outlet. Pentax drives it with a 2-pole asynchronous submersible motor with class F insulation and IP58 protection.

Features

• 15 impellers, maximum head 46 m, maximum flow 45 l/min
• About 36 m of head at 20 l/min and 7 m at 45 l/min
• 0.33 kW (0.5 HP) motor, 230v single-phase
• Made for 3-inch wells and boreholes
• Stainless steel shell, shaft and coupling
• Noryl impellers and self-lubricating polyacetal diffusers
• 1″ G threaded outlet
• IP58 motor, class F insulation

Applications

• Garden and allotment watering from a shallow borehole
• Topping up storage tanks and water butts
• Small domestic water supplies with a header tank
• Replacing a pump in an older 3-inch bore

The 3S 3-15 is for clean water only, with no more than 40 g/m³ of sand. It is not a dirty water or drainage pump and must never run dry, so Pentax recommends level probes to switch it off if the water level falls. It is made for 3-inch wells; in a much wider bore, fit a cooling jacket so water flows past the motor.

The Pentax 3S range

All four models are rated to 45 l/min with a 1″ G outlet. See the Pentax 3S 3-inch borehole pumps page for help choosing between them and answers to common questions.