Circulation pump GRUNDFOS ALPHA1 25-60 180, single-phase 220–240V

GRUNDFOS ALPHA1 25-60 180 is a domestic circulation pump engineered for hot-water and heating systems. Designed for single-phase 220–240V supply, this compact pump delivers continuous circulation for residential heating circuits, radiator loops and hot water recirculation. Its installation dimensions and flange connections match common domestic standards, allowing direct replacement of many existing circulating pumps without extensive system modifications.

Advantages

The ALPHA1 25-60 180 combines energy-efficient motor control with a simple mechanical design to ensure dependable operation and low running costs. Its compact size and standard connection pattern reduce installation time and complexity. The pump includes integrated protection against dry running and is designed for quiet operation, supporting stable temperature distribution throughout the heating or domestic hot-water system.

Suitable for

• Residential central heating circuits and radiator loops
• Domestic hot water recirculation systems
• Replacement of standard inline circulation pumps in apartments and houses
• Small commercial spaces with single-phase 220–240V supply

Key specifications

• Supply voltage: single-phase 220–240V
• Pump size: DN25 (25 mm connection)
• Maximum head: up to 6.0 meters depending on operating point
• Maximum flow: suitable for typical domestic heating flow rates
• Speed control: multi-speed or automatic energy-optimising control modes
• Installation type: inline circulation pump for horizontal or vertical mounting per manufacturer guidance
• Material: corrosion-resistant wet rotor and pump housing for domestic heating water

How to use

Install the pump in the circulation loop following local regulations and the system manufacturer’s instructions. Ensure the electrical connection matches single-phase 220–240V supply and that all fittings are tightened to avoid leaks. Prime the pump and remove air from the system before commissioning. Select the appropriate speed or automatic control mode to match the hydraulic requirements of the heating system and verify correct flow and temperature balance across radiators or hot-water outlets.

Usage recommendations

For optimal performance, use GRUNDFOS ALPHA1 25-60 180 in closed heating circuits with clean, treated water. Periodically check for air in the system and inspect seals and connections for signs of leakage. When replacing an existing pump, compare flange dimensions and electrical ratings to ensure compatibility. If uncertain about electrical wiring or system configuration, consult a qualified heating technician or electrician.