Choosing a dewatering pump starts with two numbers: the flow rate you need (m³/hr) and the total head the pump must overcome — the vertical lift plus friction losses in the discharge line.
Once those are fixed, weigh three more factors: the solids and silt content of the water (which decides between open- and closed-impeller designs), the power source available on site (diesel vs electric), and access for delivery and servicing. For deep excavations, a high-head single-stage pump such as the High Head OP is usually the right call; for trash-laden water, a vacuum-assisted self-priming close-impeller pump handles solids without clogging.
When in doubt, share your duty point and ground conditions with our engineers and we'll specify the right unit.