Pump winterization: precautions to protect your pumps
When outside temperatures start to fall below freezing you need to take measures to protect and winterize your pump. Each year, after the first frosts, we receive questions about why pump housings are being cracked open. The force caused by the expansion of frozen liquids is significant and can result in costly damages to your pump.
How to winterize a water pump?Before you start any work on winterizing a pump it is important to follow standard safety procedures. Always make sure that the pump cannot be unintentionally switched on. Ensure that all drained liquid from the pump is carefully collected. Avoid any liquid spills which could lead to the creation of slippery surfaces or environmental pollution.
- Centrifugal pumps: Drain the pump well by using the designated drainage plugs or covers. If the centrifugal pump is fitted with a vacuum system, then check additionally for liquids in the spaces in the float box and around the non-return valve. Not draining the pump correctly in case of frost can lead to cracked pump casings!
- Piston pumps: With our wellpoint dewatering pumps (piston pump principle), the pump housing is made up of several chambers. Ensure all the chambers including the cylinders, stone catcher and valve chambers are drained and emptied. Use the drain plugs and inspection covers for this. Let the pump run dry for a short time after draining in order to remove any remaining water and condensation.
- For pumps which will not be used for an extended period of time after draining we recommend to apply a preservative to the inside of the pump housing.
- Always make sure that the drain plugs and covers are closed again before starting the pumpset.
- Always consider draining or blowing through pipelines or hoses where possible.
Pump winterization for diesel driven unitsIn addition to the above mentioned measures to protect water pumps from freezing, the following additional tips apply to diesel driven pumps.
- In the case of diesel engines, remember to periodically drain the reservoir of the fuel filter/water separator.
- Regularly monitor the condition of the battery. When the temperature drops, the battery's performance will significantly decrease while it has to work harder. Older batteries in particular can stop work without warning.
- If liquid has entered the containment tray of the casing, the lower compartment of the pump set should also be drained.
- Ensure that all fluids in the engine are suitable for use in sub-zero temperatures. This means that one should check whether or not engine coolant, engine oil, and also the fuel used can handle the local conditions.
- Do you have a diesel driven pump with SCR technology? Then keep in mind that the typical diesel exhaust fluid (AdBlue®) freezing point is -11° Celsius, 12 °Fahrenheit. Should you have any questions about this, please feel free to contact us.