Pedrollo CPM/CP ST4 Stainless Steel Centrifugal Pump – 230V/400V, 0.37–1.5kW

The Pedrollo CPM/CP ST4 Centrifugal Pump range is the stainless steel version of Pedrollo's standard CP/CPM centrifugal pump line, with AISI304 stainless steel wetted parts in place of standard construction. It suits the same domestic, garden and small commercial water transfer applications as the standard range, but is better suited to slightly aggressive water or installations where corrosion resistance matters. Available in single-phase 230V (CPm ST4) or three-phase 400V (CP ST4) motor versions across five model sizes.

• Application: Domestic water supply, garden and irrigation systems, tank transfer, small commercial pressure-boosting where corrosion resistance is needed.
• Motor options: Single-phase 230V (CPm ST4 range) or three-phase 400V (CP ST4 range).
• Power range: 0.37kW (0.50HP) to 1.5kW (2HP) across 5 model sizes.
• Construction: Stainless steel (AISI304) wetted parts – same hydraulic performance as the equivalent standard model.
• Performance: Max head from 23m up to 48m, and flow rates up to 140–160 L/min depending on model.

Key Features

• Stainless steel construction: AISI304 wetted parts offer better corrosion resistance than the standard range, useful for slightly aggressive water or installations where hygiene or longevity matter.
• Same hydraulic performance as standard range: Flow and head figures match the equivalent standard CPm/CP model – only the material construction differs.
• Choice of motor: Single-phase 230V (CPm ST4) models work off a standard household supply; three-phase 400V (CP ST4) models suit properties or sites with a 3-phase electrical connection.
• Twin-outlet 170M variant: The CPm170M-ST4 / CP170M-ST4 shares the CPm170 ST4 / CP170 ST4 curve but is a distinct model – confirm which you need before ordering.

Typical Applications

• Domestic water supply and pressure boosting where corrosion resistance is preferred
• Garden and small-scale irrigation systems
• Tank-to-house or borehole-to-tank transfer
• Farm and smallholding water supply
• Small commercial systems needing moderate head at higher flow with a stainless wetted end

Technical Specifications

Flow and head figures are taken from the equivalent standard CPm/CP model's Q/H curve, on the basis that the ST4 version shares the same hydraulic design and differs only in wetted-part material. Tolerance of characteristic curves complies with EN ISO 9906 Grade 3B.

What's Included

• 1 x Pedrollo ST4 stainless steel centrifugal pump (model and phase as selected)

Please note: Installation fittings, electrical protection, control boxes, cables, unions, brackets, or accessories are not included unless specifically listed above.

Installation & Compatibility Notes

• Confirm your required flow rate and head against the table above before ordering.
• Single-phase 230V (CPm ST4) models run off a standard household supply. Three-phase 400V (CP ST4) models require a 3-phase electrical connection and installation by a qualified electrician.
• Not every model in this range is available in both single- and three-phase – check the table above before ordering.
• Confirm connection size and pipe compatibility with Zisabo before ordering.
• Qualified installation is recommended, particularly for three-phase wiring, electrical protection, and any control box requirements.

Warranty & Support

This product is supplied with the applicable manufacturer or supplier warranty, subject to correct installation, correct application, and warranty terms.

Zisabo supplies quality plumbing, pump, filtration and electrical products with practical support to help customers choose the correct item for their application. If you are unsure whether this product is suitable, contact us before ordering and our team will assist where possible.

Need help choosing? If you're unsure which model or phase suits your system, contact Zisabo with your required flow rate, head, pipe size, and available power supply (single- or three-phase), and we'll help you select the correct pump.