A recirculation pump is a unit installed in a heating system to increase efficiency and reduce costs. The use of a water recirculation pump helps accelerate the flow of coolant into the radiator and prevent heat from escaping through the system. Here we will first discuss how a water recirculation pump works, about its features and how to choose a pump.

How a Recirculation Pump Works

Boilers are increasingly used to heat water in homes and private apartments. Generally, they are installed in a basement or other technical room in a building. Since the bathroom and faucet are built in different parts of the apartment, the tenant must wait until hot water reaches a point in the building. It usually takes a few minutes for some of the water from entering the sewer system. The longer the pipe, the more fluid loses the system.

To prevent water and heat loss, many residents installed recirculation pumps. They are designed to maintain a stable temperature before all the water points in the house. In addition to the hot water recirculation pump in the system, a drain pipe is installed, and the coolant is returned to the water heater. But not all modern water heaters are equipped with a drain connection. In this case, the supply line must be connected to cold water supply.


The timer relay is used to control the operation of the recirculation pump because the unit is not used for continuous use, but only to maintain the required water temperature. In practice for well-ventilated pipes, this time is 20-25 minutes. Most modern pumps are equipped with time relays and temperature sensors. In such a device, the time interval between the start and stop of the pump by the regulator is defined in the program.

Proper equipment settings allow you to reduce your equipment’s energy consumption by at least 50%. To further reduce energy costs, some models are equipped with an automatic control system adapted to the needs of the built-in person. After installation of the pump, the system monitors, e.g., Residents for one to two weeks. Then, the controller receives data which allows for adaptation to specific operating conditions.

How to Choose a Water Recirculation Pump

When purchasing hot water recovery equipment, it is necessary to determine its most important parameters. This includes:

  • Performance – This function depends on the field. On the average level of a private apartment or three bedrooms on two floors, there are enough units to pump 70 to 100 liters of heat transfer fluid per unit. Minute.
  • The head is another essential feature that represents the maximum height of the refrigerant supply. In the case of a two-story private house, the equipment must be selected, and the resulting pressure is 3-4 meters;
  • Power Consumption – This factor allows you to determine the cost of using a recirculation pump. It should be remembered that the more powerful and efficient the device is, the more expensive it will be;
  • Built-in protection – It is best to buy a pump with a hydraulic switch. This component protects the pump from “dry running” and overheats the equipment car.

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