The Wilo Medana CH1-LC.1003 is a horizontal multistage centrifugal pump designed for clean-water supply, pressure boosting, irrigation and circulation applications. Its compact horizontal construction makes it suitable for building-services installations where reliable pressure and water transfer are required without the footprint of a vertical multistage pump.
This model is powered by a 1.5 kW three-phase motor and combines a KTL-coated cast-iron pump housing with stainless-steel hydraulic components. The exact Wilo configuration is Medana CH1-LC.1003-5/E/E/10T, Article No. 4231438.
Wilo Medana CH1-LC.1003 Performance
The CH1-LC.1003 has a maximum flow of 15 m³/h and a maximum head of 36 m. Its suction and discharge connections are 1½” × 1¼”.
These maximum figures are useful for comparing models, but they should not be treated as a single operating point. The correct pump should be selected against the actual flow and pressure required by the installation.
For pressure boosting applications, this model can be considered where the required duty falls within its hydraulic operating range. System design, pipe losses, available inlet pressure and the required delivery pressure should be considered before final selection.
Technical Specifications
| Brand | Wilo |
| Series | Medana CH1-LC |
| Model | CH1-LC.1003 |
| Full Model | CH1-LC.1003-5/E/E/10T |
| Article No. | 4231438 |
| Pump Type | Horizontal multistage centrifugal pump |
| Rated Power | 1.5 kW |
| Phase | Three phase |
| Maximum Flow | 15 m³/h |
| Maximum Head | 36 m |
| Connection Size | 1½” × 1¼” |
| Pump Housing | KTL-coated cast iron |
| Hydraulic Components | Stainless steel |
Applications
- Water supply
- Pressure boosting
- Irrigation systems
- Clean-water transfer
- General water circulation
- Building-services water systems
Selecting the Right Pump
Pump selection should be based on the required flow rate and total dynamic head, not simply the maximum flow or maximum head shown in the specifications.
For projects where the operating duty is not known, provide the required flow, pressure or head, application and available electrical supply so the appropriate pump can be selected.
Delivery & Warranty
Delivery: 1–2 working days, subject to availability.
Warranty: 1 year.
For project requirements or pump selection assistance, contact OPAR Online with the required duty point and installation details.
Explore our range of horizontal multistage pumps for other flow and pressure requirements.




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