How to choose the right circulator pump..!


Circulator pumps are used for the circulation of gases and liquids in a closed circuit. The fluid runs through the system in a loop, continually returning to the pump which maintains its pressure. These pumps have applications in domestic, commercial and industrial domains.

Some of the most common uses for a circulator pump can be found in the circulation of water as part of heating or cooling systems. In a water heating system, the pump is used to push hot water through pipes around the building, often using radiators to heat each room.

The size and power of a circulator pump can vary depending on the application, taking into account the type of circulation fluid, its flow rate and operating conditions.

** Pumps with aluminium or cast iron casing, containing bronze or stainless steel internal components, are usually suitable for systems that use water. However, in systems which use highly corrosive fluids or operate at high temperatures or pressures better performance can be ensured with pumps made from titanium, metal alloys, and chemically-resistant plastics **

Working out which circulator pump you need yourself is not an easy task! Please do not hesitate to contact a professional, we are happy to help you here at ATAC Solutions. However, we will need a few things from you so please be prepared with the following..

1. Measure the size of connection
2. Face to face distance – length of the pump from inlet to outlet
3. Static head – distance from the lowest to the highest part of the system
4. Flow rate – be prepared with number of radiators, type of boiler, type of house (how many floors). (If the flow rate is correct you will get maximum output from the system)

Examples of Popular Circulator Pump Models..

Wilo Yonos Pico 15/1-6-130
15 – Size of connection thread (mm)
1-6 – Static Head
130 – face to face distance (mm) usually domestic at 130

Wilo Yonos Pico 25/1-8-180
25 – Size of connection thread (mm)
1-8 – Static Head
180 – face to face distance (mm) usually commercial at 180

Lowara Ecocirc 15-6/130
15- size of connection (mm)
6 – Static Head
130 – Face to Face Distance (mm)

Lowara Ecocirc 25-6/180
25 – size of connection (mm)
6 – Static Head
180 – Face to Face Distance (mm)

Dab Evostar 40-70/130 or 40-70/180
Standard 1 inch thread
40-70 – 4 to 7m Static Head
130/180 – Face to Face Distance (mm)

Grundfos UPS 2-15-50/60 (Three Speed Circulator)
2-15 – size of connection
50/60 – Static Head

Magna 1 25-6/180
25-6 – size of connection
180- Static Head

Alpha 2 15-60/130 (Variable Speed Circulator)
15-60 – size of connection
130 – Static Head

If you would like to discuss this further, or would like to place an order please contact us on;

Tel: 01622 882400

Atac Solutions Ltd
Units 1-2 Shingle Barn
Smith’s Hill
West Farleigh
ME15 0PH



The new EVOSTA thanks to advanced technology used in the permanent magnet synchronous motor and the frequency converter, the new range of EVOSTA circulators ensures high efficiency in all applications, obtaining important results in terms of energy saving.

The new Dab Evosta circulator adapts to any space. With Evosta, Dab Pumps completes the Evo series ranging from Evotron to Evoplus. This version is specifically designed for the needs of heating systems and adjusted on basic needs.

Primarily conceived for residential applications, given its small size and peculiar characteristics, the youngest of the Dab family is the new entry of the electronic series. – a single product that is an alternative to a wide range of products on the market, with a pressure from 4 to 7 meters, available with different system connection configurations.


For a full description and technical drawings please visit our pump shop HERE