How to winterize a pump or waterworks

Do you own a pump or home waterworks in a location where the temperature drops below freezing during the cold months? If so, it's time to winterize them with dewatering.
But how exactly do you go about the winterization process and what to look out for? Each type of pump has its own specifics that need to be taken into account. Therefore, we will try to advise you on the procedure in this article. If you are unsure about something, it is better to contact our expert advisors in the service department.

How to winterize a surface pump

The simplest procedure is for surface pumps, which are most often used for watering gardens.

These pumps have a drain plug or other element to drain the water.

  • So you disconnect the hoses from the machine and tilt the pump to let the water flow out.
  • The pump must then be flushed with fresh water to prevent deposits. This is particularly important if the water you use is too hard, contains high levels of iron or minerals. Then store the pump in a dry room.
For cast iron pumps, it is recommended to refit the plug after flushing, fill the pump with potable water and store it in a dry room where it will not freeze

How to winterize a domestic water pump

Domestic waterworks are usually in operation all year round, so they are usually ready for winter operation when they are installed. Exceptions are waterworks in holiday homes such as cottages and lodges, where the domestic waterworks are primarily used during the summer. In the event that the water room could freeze, you must drain the water from the entire installation.

  • You turn off the waterworks by unplugging it and drain it by first opening the drain valves on the shut-off valve behind the waterworks.
  • Then drain the water from the discharge line and pressure vessel and then unscrew the drain plugs of the body and drain the pump.
  • Screw in the drain plug just before starting again. It is recommended that the plugs be lubricated with tallow, cooking grease or petroleum jelly.

How to winterize a surface pump

Consult an expert

Even if you can do the winterisation yourself, remember that you also need to pay attention to other elements of the system that are not stored at an unfrozen depth or otherwise protected against frost. Whether it's the irrigation system, suction pipes or control systems such as the pressure unit or frequency converter. So don't be afraid to consult a professional and save yourself unnecessary complications that can take you by surprise in the spring due to improper winterisation of the pump or waterworks.