CP3 Cast Circulating Pumps – 3-Speed Hot Water Circulators
CP3 Cast Circulating Pumps – 3-Speed Hot Water Circulators
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The CP3 Cast Circulating Pump Series is designed for hot water heating systems, underfloor heating, and radiators, as well as domestic and industrial heating/cooling circuits. With a cast iron body, 3-speed control, and operation up to 110°C, these pumps are a reliable solution for continuous water circulation.
Built with a canned-rotor design (pump and motor as one unit) and liquid-lubricated bearings, the CP3 range ensures quiet operation, low vibration, and long service life. Compact in design and supplied with unions, they are easy to install in both open and closed systems.
Models & Performance
Model | Length | Inlet/Outlet Size | Max Pressure | Max Flow Rate | Max Temp | Speed Control | Warranty |
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CP3 25/6/130 | 130 mm | DN25 (1”) – DN40 (1½”) | 60 kPa | 55 L/min | 110°C | 3-Speed | 2 Years |
CP3 25/6/180 | 180 mm | DN25 (1”) – DN40 (1½”) | 60 kPa | 55 L/min | 110°C | 3-Speed | 2 Years |
CP3 32/8/180 | 180 mm | DN32 (1¼”) – DN50 (2”) | 90 kPa | 160 L/min | 110°C | 3-Speed | 2 Years |
Key Specs & Features
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Application: Domestic & industrial heating/cooling, underfloor systems, radiators, solar hot water
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Performance: Max flow up to 160 L/min, max pressure 90 kPa (model dependent)
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Design: 3-speed control for flexible operation; canned-rotor design with only two seals
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Temperature Resistance: Handles hot water up to 110°C
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Construction: Cast iron pump body with unions included
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Operation: Quiet, low-vibration, with liquid-lubricated bearings
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Warranty: 2-year warranty
FAQs
Q: Can these be used with underfloor heating?
Yes – they are designed for underfloor, radiator, and hot water heating systems.
Q: What’s the main difference between models?
The 25/6 models (130 & 180) deliver up to 55 L/min, while the 32/8/180 delivers higher capacity (160 L/min) for larger systems.
Q: Are they noisy?
No – the canned-rotor design and lubricated bearings make them quiet and low vibration.
Q: What warranty is included?
Each pump comes with a 2-year warranty.


