Dewatering Pumps

Dewatering Pumps: A Comprehensive Guide

Dewatering pumps are vital tools to remove or control unwanted water in construction, mining, and municipal operations. These pumps, designed to handle clean or dirty water, support a range of applications including site excavation, flood response, groundwater control, and wastewater management. They ensure safe, dry, and efficient working environments by lowering water tables and managing fluid buildup. Cleanflow stocks electric submersible dewatering pumps up to 5 HP, gas engine pumps from 1 in. to 4 in., and cordless and utility pumps for small jobs, plus hoses, strainers and other dewatering equipment, shipped from Winnipeg across Canada.

Types of Dewatering Pumps

Effluent Pumps

• Effluent pumps are submersible devices designed to handle graywater containing small solids (up to ¾"), making them ideal for septic systems, basement drainage, and sump pits. Commonly used in homes, farms, hospitals, and schools, they are effective for moving partially treated wastewater in situations where water is dirty but not heavily contaminated.

Gas Engine Dewatering Pumps

• Gas engine dewatering pumps are portable, rugged units ideal for off-grid or emergency use, quickly moving large volumes of water through centrifugal action. Commonly used in construction, agriculture, and flood response, they are best for draining flooded trenches, fields, or tanks where electricity isn’t available, though they are not designed to handle solids.

Submersible Dewatering Pumps

• Submersible dewatering pumps are designed to operate fully underwater and are ideal for removing clean or dirty water, with heavy-duty models capable of handling solids. Commonly used in mining, construction pits, deep wells, and industrial sites, they feature modern auto on/off and energy-saving functions, making them efficient for lowering groundwater and continuous water removal in deep or flooded areas.

Utility Dewatering Pumps

• Utility dewatering pumps are lightweight, easy-to-use, and versatile tools designed for handling clear or slightly dirty water. Ideal for small-scale applications such as draining pools, water heaters, or managing minor indoor floods, they are best suited for residential or light-duty use and are not intended for pumping solids or heavy-duty tasks.

Which Dewatering Pump Do I Need?

• Basement, pit or pool, power nearby: HCP GD-400 submersible dewatering pump, 64 GPM.

• Drain right down to the floor: HCP GDR-400 puddle sucker, pumps to about 1/16 in.

• Muddy or silty water: HCP A-21, 88 GPM, passes 3/8 in. solids.

• Debris and solids up to 1 in.: Multiquip ST2040T submersible trash pump, 79 GPM. More in trash pumps.

• No power on site: Multiquip QP2H 2 in. gas engine dewatering pump, 3.5 HP Honda.

• Big trenches and fields: Kodiak PWP4HX 4 in. gas pump, 476 GPM.

• Ponds, tanks and flooded floors: HCP L-405A 4 in. submersible, 216 GPM on 120 V.

• Meter pits, manholes and small jobs: cordless Reed Pump Stick, 330 GPH.

• Light utility work: Flotec and Simer utility pumps.

How Do I Size a Dewatering Pump?

• Flow (GPM): gallons to move divided by minutes available, plus 20 percent. 10,000 gallons in two hours needs about 100 GPM.

• Head (ft): the vertical lift from the water to the discharge point. Most 2 in. submersibles here are rated 37 to 50 ft. For a deep pit, pick a high-head model such as the HCP AN-21.5H (73 ft).

• Solids: HCP submersibles pass 1/4 to 3/4 in., Kodiak gas pumps 1/4 in., and Multiquip submersibles are for clear water. For sewage, see sewage pumps.

Explore Dewatering Pumps at Our Canadian Warehouse

• Multiquip QP15HP 1.5-Inch High Pressure Dewatering Pump with Honda Gas Engine

• The Multiquip QP15HP 1.5-Inch High Pressure Dewatering Pump with Honda Gas Engine is a compact, portable high-pressure pump designed for versatility and performance. Weighing just 22 lbs, it’s ideal for tasks like water jetting, irrigation, equipment wash-down, and emergency firefighting. Powered by a reliable 2.1 HP Honda engine, it delivers a high flow rate of 56 GPM, a maximum head of 197 ft, and up to 86 PSI. Key features include quick priming, durable construction with a ductile iron impeller and volute, and shock-mounted components to reduce vibration.

• Multiquip QP2H 2-Inch Honda Gas Engine Centrifugal Water Pump

• The Multiquip QP2H 2-Inch Honda Gas Engine Centrifugal Water Pump is a high-performance 2" centrifugal water pump powered by a reliable 3.5HP Honda GX120 engine, designed for efficient clear water transfer in demanding applications. It delivers a maximum flow rate of 158 GPM, a lift of up to 25 feet, and a total head of 115 feet, making it ideal for dewatering tasks with minimal solids. Built for durability, it features an industrial-grade aluminum body, cast-iron fittings, and a balanced ductile iron impeller for abrasion resistance. Additional highlights include a 180° rotating discharge port, an engine oil-alert system, and a sturdy tubular steel frame for easy transport and protection.

• Multiquip QP205SLT 2-Inch High Pressure Dewatering Pump with Honda GX240 Engine

• The Multiquip QP205SLT 2-Inch High Pressure Dewatering Pump with Honda GX240 Engine is a compact yet powerful solution ideal for demanding applications like firefighting, landscaping, and temporary sprinkler setups. Engineered for one-person operation, it features a robust 7.9HP Honda GX240 engine, delivering up to 126 GPM with a maximum head of 312 feet and 135 PSI pressure. With flexible discharge options—one 1.5-inch or two 1-inch ports—it supports independent or simultaneous use, ensuring versatility on the job.

Not sure which one? Email the volume, the lift and whether there is power on site to info@cleanflow.ca and we will match a dewatering pump.

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