Which cellar pump to choose?

Which cellar pump to choose?

A cellar drain pump is a device used to evacuate water from an underground room. It is a handy and light lifting pump, also called “mop pump”. Its main function is to drain flooded cellars. This type of device is equipped with a probe allowing it to suck up puddles at 1 mm from the ground.

Generally, it is made of stainless steel to protect its components immersed in water. But… which model of cellar pump to choose?

Why choose a submersible sump pump?

This type of submersible pump has advantages relating to its design. It is a device resistant to corrosion caused by humidity.

Thanks to its stainless steel construction material, its components remain robust. In addition, all its accessories are protected by a perfectly insulating material.

Its watertightness protects its electrical circuit against water. The filtration system is a feature that traps waste that can damage the device. On the other hand, bulky objects are separated from the recovered water. The submersible pump has a very practical automatic activation system.

It starts and stops automatically depending on the presence of water. A float built into the unit functions as a switch that turns the pump on or off. Manual activation and deactivation are also possible. Getting started with this type of water pump is quick. Thanks to its simple ergonomics, it is handy and easy to install up to 8 m deep.

How to choose the location of the cellar pump?

The location of the pump varies depending on the location to be drained. The main thing is that it be placed on a flat and stable support. Whether in a basement or in a pool, the lower base of the device must touch the bottom.

The submerged pump is used in the event of flooding to evacuate water from cellars, underground car parks and boxes. But, it can also be used to dry roofs, tanks and reservoirs.

What is the composition of the water to be evacuated?

There are empty cellar pumps for clear water or charged water. The nature of the water to be pumped determines the choice of device used. For relatively clear water, such as rainwater, a specific classic pump for clear water will suffice.

A device designed to collect clear water contains a specific filtration device. Particles larger than 4 mm contained in the water do not pass through the pump. The evacuation of dirty water requires the use of a pump which blocks particles with a diameter greater than 10 mm . Generally, it is the murky flood waters that are drained by this type of pump. Another specific model of pump is put into service to expel the waste water.

This model has a filtration device designed for 20 mm particles. Water with a high waste content can only be evacuated by a type of pump suitable for 35 mm particles.

Delivery height

This criterion determines the choice of the pump model to be used depending on the location. Indeed, it is the distance that separates the submerged pump from the highest point of the discharge pipe. The suitable pump brand indicates this head in meters, associated with the motor power in kW. These two factors determine the flow rate of the pump and make it possible to define the THD (Total Manometric Head).

Pump flow

This element indicates the volume of water pumped in a given time interval. It informs the user of the time needed to drain the water (in liters per minute).

The damage caused by a flood can thus be limited if the quantity of water expelled is rapid.

Observe the components of the sump pump

For optimal efficiency, the sewage pump must be equipped with a flexible delivery pipe, with a suitable length and diameter.

The length of the pipe must be sufficient to connect the flooded area to the evacuation point. The diameter of the discharge pipe determines the flow. In addition, it must be made up of a chopper wheel fitted with knives to grind the waste sucked up by the pump. Each brand of pump indicates the diameter of the particles it can handle.

This is the particle size index provided by the manufacturer. To expel clear water, this index can correspond to 10 mm. On the other hand, to treat contaminated water, this index will be 50 mm.

Conclusion: which cellar pump to choose?

Thus, this article presents the criteria that help you choose the most efficient pump model. This is the submerged, solid and economical cellar pump. Please note that to empty a flooded room, the following elements must always be taken into account:

• The nature of the water to be pumped
• The discharge head measured between the pump and the discharge point
• Pump flow

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