Simply put, dewatering pumps are devices that help you drain water that has flooded or pooled in a work area (a construction, industrial or mining site).

You may come across an air, electric, gasoline, diesel or hydraulic-powered dewatering pump. Additionally, the dewatering pump can either be submersible in water or not. The pumps that are not submersible are referred to as surface dewatering pumps. Here's what you need to know to help you choose the right pump:

The Presence of Debris?

Of course, flooded water might contain some debris. Your environment or project (mining, industrial, construction) determines the type of debris. Find out what these solids are so that you can choose a dewatering pump that is designed to pump such solids without getting damaged. Debris usually causes abrasive wear in dewatering pumps.

Water pH

Again, your environment determines the water pH. It is crucial to measure the water pH because acidic water can corrode your dewatering pump. Choose a dewatering pump that can withstand acidic water.

Air, Electric, Gasoline, Diesel and Hydraulic Dewatering Pumps

The difference between these dewatering pumps is not only in how they are powered, but in cost and the presence of some features and advantages.

Air dewatering pumps have a self-priming feature, meaning you won't need to manually prime the pump each time you need to use it. You just need to drop a hose in the wastewater and start dewatering. Air dewatering pumps are not good with debris; you might be required to add a strainer (it filters large debris) and replace the rubber diaphragm with a thermoplastic diaphragm. An air-operated dewatering pump might also be pricier. It is also considered safe because it doesn't use electricity or gasoline.

Electric, gas and diesel-powered dewatering pumps are straightforward and the most common. Just as their names suggest, they are powered by electricity, gasoline and diesel. You have to weigh your costs to find out which power source will cost you.

Hydraulic dewatering pumps are considered lightweight and strong. They can handle pumping large amounts of water that contains large debris. If you know you need a powerful pump that can handle almost all debris, this is the pump for you.

Submersible Dewatering Pumps

Most submersible pumps are electrically powered. Their main advantages are that they do not need to be primed, are energy efficient and are quiet. Their disadvantage is that they cannot withstand debris, and you have to inspect and maintain them regularly. Seals have to be inspected to avoid water sipping into the motor.