Circulation pump Omnigena CALDA 25-60/180 Auto — central heating pump, 25 mm, head 6.0 m, length 180 mm

Omnigena CALDA 25-60/180 Auto is a circulation pump for central heating systems designed to move hot water through radiators, boilers and closed-loop heating circuits. With a 25 mm connection diameter, an installation length of 180 mm and a maximum head of about 6.0 m, this pump is intended for residential and light-commercial hydronic heating applications. The Auto configuration supports automatic operation and the unit is supplied with two union fittings for straightforward installation into existing piping.

Advantages

The pump offers a compact design with a standardized 180 mm installation length and 25 mm inlet/outlet that fits common heating layouts. A maximum head of approximately 6.0 m enables adequate pressure for multi-radiator circuits and small to medium-sized systems. Automatic operation simplifies control and can reduce the need for external switching devices. The inclusion of two union fittings facilitates maintenance and replacement without extensive pipework modifications.

Suitable for (tasks / use cases)

• Circulating hot water through residential radiator systems
• Connecting to domestic boilers and heat generators
• Closed-loop hydronic systems in apartments, houses and light-commercial buildings
• Replacement or upgrade of existing 25 mm circulators with 180 mm installation length

Key specifications

• Connection diameter: 25 mm
• Maximum head: approximately 6.0 m
• Installation length: 180 mm
• Application: central heating / hot-water circulation
• Operation mode: automatic (Auto)
• Included parts: two union fittings for connections

How to use

Install the pump in the heating circuit following local regulations and manufacturer mounting orientation. Shut off and drain the section of the system where the pump will be fitted, then connect the 25 mm unions to the corresponding piping using appropriate seals or gaskets. Refill and vent the system to remove air pockets before starting. Configure or connect the pump’s automatic control functions as required by the heating system layout and electrical supply. Verify proper rotation and flow direction after commissioning and check for leaks at all joints.

Usage recommendations

Use compatible glycol concentrations if antifreeze is required, and follow water quality guidelines to prevent corrosion and deposits. Regularly inspect unions and seals and perform periodic system bleeding to maintain performance. For systems with special control requirements or larger hydraulic head losses, consult a heating professional to ensure correct pump selection and configuration.