Circulating Pump GRUNDFOS ALPHA1 GO 25-80 180 mm 220–240V

GRUNDFOS ALPHA1 GO 25-80 180 mm 220–240V is a compact circulating pump for domestic central heating systems. With a 25 mm connection diameter and an 80 mm maximum head, this pump is designed for water circulation in radiator and boiler circuits. The 180 mm pump length and standard voltage make it suitable for retrofit and replacement in residential heating installations, ensuring dependable hydraulic performance in low-temperature and typical household heating loops.

Advantages

The pump combines a compact footprint with quiet operation and energy-efficient motor control. Its construction supports straightforward mechanical replacement of older circulators without major piping changes. The design delivers stable flow rates across typical heating demands while minimizing electrical consumption within the 220–240V supply range.

Suitable for

• Replacement of existing residential heating circulators with 25 mm connections
• Domestic radiator circuits and small boiler loop circulation
• Retrofit projects in apartments and single-family homes
• Systems requiring a compact pump with up to 80 mm head

Key specifications

• Connection size: 25 mm
• Maximum head: 80 mm
• Installation length: 180 mm
• Operating voltage: 220–240 V AC
• Application: domestic central heating circulation
• Typical mounting: in-line pump installation for radiator/boiler circuits

How to use

Install the pump in the heating circuit following local plumbing and electrical regulations. Ensure the system is depressurized and drained at the installation point before removing the old unit. Position the pump with the motor shaft horizontal where applicable and tighten connections to appropriate torque values for the 25 mm pipe fittings. Refill and ventilate the system, then restore power and verify correct rotation and flow. Monitor for leaks and confirm that the pump achieves stable circulation across the intended heating zones.

Usage recommendations

Use corrosion-resistant fittings and appropriate sealing materials for the 25 mm connections. For best efficiency and longevity, maintain water quality within the system, avoid excessive air ingress, and perform periodic checks of electrical connections and pump bearings. If replacing an older model, compare installation length and connection thread type to ensure compatibility.