Overview

High-volume water delivery for demanding applications.

The CMB20-40T three-phase horizontal multistage pump is designed for applications requiring substantial water flow while maintaining useful delivery pressure.

Ideal for farms, lifestyle blocks, irrigation, washdown facilities and commercial water systems, this powerful 4kW pump offers efficient, quiet-running performance with corrosion-resistant stainless steel construction.

Its high-flow capability makes it suitable for installations supplying multiple outlets simultaneously, provided the available pressure at the required flow matches the system.

Pump & Purify multistage pumps are constructed to a proven design, using quality metal components and exacting manufacturing standards.

This pump requires a suitable three-phase electrical supply and appropriate installation controls.

The right choice depends on your required flow, pressure, pipework, elevation and water source - not simply the number of taps.

Check the Performance tab or contact us for straightforward advice before ordering.

Performance

Designed for higher-volume water delivery where both flow and pressure are important.

• Maximum flow: 466 litres per minute
• Maximum head: Supplier states 58 metres — performance curve requires confirmation
• Maximum operating pressure: 8 bar

Maximum flow and maximum head are separate limits. The pump does not deliver 466 litres per minute at maximum pressure.

Approximate performance from the supplied curve:

These are approximate readings from the supplied performance curve, not guaranteed installation pressures.

Actual delivery depends on pipework, elevation, fittings and system losses.

Need help checking suitability? Send us your water source, pipe length and diameter, elevation difference and expected water demand.

Specifications

• Model: CMB20-40T
• Motor power: 4.0kW / 4000W
• Electrical supply: Three-phase, 50Hz
• Maximum flow: 466 LPM
• Maximum discharge head: 58m stated — pending curve verification
• Maximum operating pressure: 8 bar
• Liquid temperature: Up to 70°C
• Inlet connection: 2" BSP
• Outlet connection: 2" BSP
• Ingress protection: IP55
• Insulation class: F
• Duty rating: Continuous
• Motor protection: Built-in thermal overload protection
• Dimensions: 540mm L × 250mm H × 180mm W
• Electrical connection: No plug supplied
• The 8 bar maximum operating-pressure rating is separate from the pressure the pump generates.

Refer to the Performance tab for approximate flow and head at different operating points.

A suitable three-phase electrical supply and installation by a qualified electrician are required.

Construction

• Mechanical seal: Carbon / silicon carbide (SiC) / EPDM
• Suction and discharge chambers: AISI 304 stainless steel
• Impellers and stages: AISI 304 stainless steel
• Motor shaft: AISI 304 stainless steel
• Bearings: Low-noise bearings
• Electrical connection: To be installed by a suitably qualified electrician
• Warranty: 2-year manufacturing defect warranty — view terms

Construction

• Pump housing: Stainless steel
• Motor shaft: Stainless steel
• Impellers: Stainless steel
• Intermediate chambers: Stainless steel
• Construction: Corrosion-resistant metal components
• Bearings: Designed for quiet operation
• Motor protection: Built-in thermal overload protection
• Motor enclosure: IP55
• Duty rating: Continuous
• Warranty: 2-year manufacturing defect warranty — view terms

Designed for reliable operation in agricultural, commercial and high-demand water supply applications.

FAQs

Will this pump run 22 taps at once?

The pump has substantial flow capacity, but the number of outlets it can support depends on their individual flow requirements, pipework, elevation and the pressure needed. The supplier's 22-tap figure is an indication only, not a guarantee.

Does it deliver 466 LPM at maximum pressure?

No. Maximum flow and maximum head occur at different points on the performance curve. See the Performance tab.

Can I use this pump for farm washdown?

Yes, provided its flow and pressure suit your washdown equipment and water supply.

Does it need three-phase power?

Yes. This model requires a suitable three-phase electrical supply. No plug is supplied.

Does it include an automatic pressure controller?

No. Suitable controls and switching equipment must be selected separately for the installation.

Is this pump self-priming?

It is not specified as self-priming. Confirm the installation and priming requirements before use. Never run the pump dry.

Can it be used for irrigation?

Yes, provided the pump curve matches the flow and pressure requirements of your irrigation system.

Are spare parts available?

Contact us with your model number and details of the part required so we can confirm availability.