How to drain a flooded cellar / crawl space

In the UK unpredictable rain showers quickly flooding the streets, causing unwanted water levels to rise in cellars and crawl spaces.

  • Flooded cellar / crawl space
  • Draining or pumping dry?
  • Solid particles
  • Automatic system
  • Difficult accessible places

If you are looking for a submersible pump, we will be happy to help you find the appropriate model. Please refer to the pump configurator on our homepage. If you specify your wishes and requirements, the configurator will work out which pump best fits your situation, and you will be assured that you are choosing the right one.

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Flooded cellar / crawl space

Heavy rain showers frequently cause flooding in underground spaces. As a result, people often ask us to help them determine how to drain their cellars. As every situation is different, it is not easy to give unequivocal advice.  For example, does the space need to be drained or pumped dry? Does the water contain solid particles, and, if so, how big are they? Several factors need to be taken into account when selecting a pump appropriate for your situation.

Draining or pumping dry?

Regular submersible pumps are capable of draining a space, but only to a certain water level (> 10-20 mm). However, a puddle pump is capable of draining a surface practically 'mop dry', which means that only about 2 mm of water remains.

Solid particles

In many cases, the water is polluted with sand, which is also regarded as comprising 'solid particles'. Every submersible pump is able to process solid particles up to 2 mm, and this makes them suitable for processing water that contains a certain amount of sand. However, in other cases the particles may involve larger pollutants such as street dirt and leaves, for which a more specific type of pump is needed: the submersible wastewater pump.

Automatic system

The submersible pumps currently in our collection are all fitted with a float, which ensures that the pump switches on/off automatically when it is immersed in water. For example, if you have a space that floods frequently, or you have created a collecting tank, a pump fitted with a float will be an excellent solution. In this way, the water is discharged automatically to the intended location.

Difficult accessible places

People often think that only submersible pumps can be used for draining such spaces, but in some situations garden pumps will work even better; for example,  in spaces that are difficult to access because their passageway is too narrow for a submersible pump. The garden pump's suction hose is usually thin enough to fit through. Choosing a pump for your situation depends on several factors, and we hope the information provided helps you make the right choice. For more information about submersible pumps, please read the following article 'What do you need to be aware of when you buy a submersible pump?'. And feel free to contact us if you have any other questions.