Grundfos MAGNA1 25-60 Circulating Pump - High Efficiency Central Heating Circulator

Description

The Grundfos MAGNA1 25-60 is a high efficiency, variable speed circulating pump built for domestic and light commercial heating systems. With a 6 metre head and a G1½" threaded connection on the standard 180mm port to port body, it's the natural direct replacement for older fixed speed circulators in most UK three and four bedroom homes, and it's equally at home in ground source heat pump and secondary mixing loop applications. A permanent magnet motor with a built in frequency converter automatically matches flow and head to real system demand, so you get quieter running, lower running costs and a genuinely low maintenance canned rotor design with no shaft seal to fail. Whether you're a home owner replacing a tired circulator or an installer sourcing a reliable, easy to set pump for a client's boiler upgrade, the MAGNA1 25-60 delivers dependable, energy efficient circulation.

Key Features

Energy Saving PM Motor

Permanent magnet motor with integrated frequency converter and an Energy Efficiency Index of ≤0.20, cutting electricity use well below older fixed speed pumps.

Simple Duty Selection

Choose from proportional pressure, constant pressure or fixed speed curves at the push of a button, with clear light field indication of the active setting.

Maintenance Free Design

Canned rotor construction with no shaft seal and bearings lubricated by the pumped liquid means no routine servicing and a long working life.

Drop In Replacement

Standard 180mm port to port length and G1½" threaded connections fit straight into the space left by most older domestic circulators, with no re-piping needed.

Basic BMS Ready Monitoring

Built in fault relay output and digital start/stop input give straight forward remote monitoring and control for simple building management setups.

Robust Cast Iron Housing

EN-GJL-200 cast iron pump housing rated to PN10 (10 bar) for long term durability in closed heating circuits.

Technical Specifications

Specification	Details
Brand	Grundfos
Model	MAGNA1 25-60
EAN / GTIN	5712608941900
Pump Type	Variable speed, canned rotor (wet rotor) circulator
Maximum Head	6 metres
Maximum Flow Rate	7.5 m³/h (duty flow at best efficiency point: 4.51 m³/h)
Port Connection	G1½" (DN25) male threaded, 180mm port to port
Maximum Operating Pressure	10 bar (PN10)
Liquid Temperature Range	-10°C to 110°C (typical continuous operation: up to 60°C)
Power Input (P1)	9 - 92 W
Electrical Supply	1 x 230V, 50Hz, max. current 0.09 - 0.74A
Energy Efficiency Index (EEI)	≤ 0.20
Protection / Insulation Class	IP44 / Class F
Housing Material	Cast iron (EN-GJL-200)
Net Weight	4.38 kg
Compatibility	Sealed/open vented heating systems, ground source heat pump circuits, secondary mixing and blending loops
Certifications	CE, VDE, EAC, RoHS and WEEE compliant
Warranty	Grundfos manufacturer's warranty, 24 months from installation

Ideal Uses

Primary Central Heating Circulation

The natural choice for main circulation in standard three and four bedroom UK heating systems, matching flow to the property's actual emitter load.

Boiler and Circulator Replacements

A straight forward, same footprint swap for ageing fixed speed circulators during a boiler service, upgrade or full system replacement.

Ground Source Heat Pump Systems

Reliable, efficient circulation for the heating side of domestic and small commercial ground source heat pump installations.

Secondary Mixing and Blending Loops

Well suited to mixing valve circuits and blending loops where steady, adjustable circulation is required alongside the main heating pump.

BTU Calculator

BTU & WATT Calculator

Room Dimensions

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