Circulation pump GRUNDFOS UPM3 HYBRID 25-70, 130 mm, max head 7 m, flow up to 2.5 m³/h

The GRUNDFOS UPM3 HYBRID 25-70 is a compact circulation pump designed for domestic and small commercial heating systems. With a 130 mm installation length, a maximum head of 7 m and a nominal flow rate up to 2.5 m³/h, it provides stable circulation in heating loops and hot-water circuits. The unit combines a compact mechanical design with an integrated control system and hybrid technology that simplifies installation, operation and routine maintenance while keeping electrical consumption low.

Advantages

The pump offers compact dimensions that facilitate replacement of older standard-length pumps and installation in confined spaces. Low energy consumption and an efficient motor reduce operating costs. The integrated control system adapts pump performance to system demand, improving hydraulic balance and reducing noise. Hybrid technology combines proven hydraulic components with an electronic control platform for easier commissioning and reduced maintenance effort.

Suitable for

• Residential central heating circulation and radiator systems
• Domestic hot-water recirculation loops
• Small commercial heating installations and retrofit projects
• Systems requiring compact pumps with integrated control and low electrical consumption

Key specifications

• Installation length: 130 mm
• Maximum head: 7 m
• Maximum flow rate: up to 2.5 m³/h
• Compact construction suitable for tight spaces
• Integrated electronic control for adaptive performance
• Hybrid technology for simplified installation and maintenance
• Designed for heating system circulation and hot-water loops

How to use

Install the pump in accordance with local plumbing codes and the system manufacturer’s recommendations, ensuring correct flow direction and proper sealing of pipe connections. Connect electrical supply following the wiring diagram provided by the system integrator or qualified electrician. Use the integrated control settings to match pump performance to system demand; adjust setpoints or modes as needed for constant pressure, constant curve or adaptive control if available. Bleed air from the circuit after installation and check for leaks. Periodically inspect mechanical connections and electrical terminals as part of routine maintenance.

Usage recommendations

For reliable operation, use the pump in closed heating circuits within the specified head and flow ranges. Ensure water quality meets system specifications to avoid premature wear; install appropriate filters or strainers if required. For replacement applications, verify that the 130 mm length matches the existing mounting to avoid pipe work modifications. Routine inspection of seals and electrical connections will prolong service life.