Circulator Pump Grundfos MAGNA1 25-80 180 — inline heating/cooling circulator, 25 mm connection, 180 mm length

Grundfos MAGNA1 25-80 180 is an inline circulator pump designed for heating and cooling systems. With a 25 mm connection diameter and 180 mm installation length, this circulator provides controlled flow and stable hydraulic performance for boilers, radiators, underfloor heating and chilled-water loops. The pump is intended for domestic and light commercial hydronic circuits where reliable circulation, energy-efficient operation and straightforward integration into existing pipework are required.

Advantages

The MAGNA1 25-80 180 offers electronically controlled operation for consistent flow control and reduced energy consumption compared with fixed-speed pumps. Its inline design and standardized 25 mm connection simplify installation and replacement in compact plant rooms. The pump is built for continuous operation and includes features to support quiet running and stable pressure performance across typical heating and cooling loads.

Suitable for

• Domestic central heating systems with radiators
• Underfloor heating circuits in residential buildings
• Light commercial hydronic loops and small boiler installations
• Chilled-water circuits for cooling or heat-recovery systems

Key specifications

• Connection diameter: 25 mm (inline)
• Installation length: 180 mm
• Application: heating and cooling circulation
• Control: electronically controlled variable speed
• Design: inline circulator suitable for closed hydronic systems

How to use

Install the MAGNA1 25-80 180 in the return or supply line according to local plumbing codes and the system design, ensuring correct flow direction and secure sealing of the 25 mm connections. Connect electrical supply and control wiring following the manufacturer’s installation instructions and applicable electrical standards. After installation, purge air from the circuit and set the pump control to match system requirements; verify flow and temperature differentials under operating conditions and adjust as needed for optimal performance.

Usage recommendations

Use this circulator in closed hydronic systems with compatible fluid properties and temperatures within the pump’s rated range. Regularly check seals, electrical connections and hydraulic performance during preventive maintenance intervals. When replacing an existing inline pump, confirm installation length and connection size to ensure mechanical compatibility.