Submersible pumps under 50m3/h are water pump lines (water pump motors) commonly used in residential applications, well pumping systems, or systems that do not require an excessively large water flow rate within a short period. This type of submersible pump (also known as a submerged water pump or submersible drop pump) has the capability to pump a water flow rate of less than 50 cubic meters per hour.

Applications of submersible pumps under 50m3/h

Submersible pumps with a flow rate under 50m3/h are suitable for small to medium-scale drainage and water supply needs. Thanks to their direct submerged design in water, the equipment operates quietly, saves installation space, and is easy to use.

• Drilled and dug well pumping for households: Used to extract water from drilled and dug wells for domestic use or small-scale irrigation. The machine ensures a stable flow rate, meeting moderate water usage needs in households.
• Domestic wastewater pumping: Applied in pumping and draining wastewater from storage tanks and wastewater collection pits of households or small facilities. The equipment helps process water promptly, minimizing stagnation and odors.
• Small-scale manhole and basement drainage: Used to pump rainwater and flooded water in manholes, basements, or small low-lying areas. The pump helps maintain a dry space, ensuring safety for structures and daily life.

Advantages of submersible pumps under 50m3/h

• Moderate flow rate, easy to control, meeting usage needs without causing water waste.
• Low power consumption, helping save long-term operating costs.
• Effective water resistance, ensuring stable and safe operation when submerged in water.
• Leak-proof and corrosion-resistant design, increasing the service life and durability of the pump.
• Stable operation, low noise generation, without affecting daily life and the working environment.

Price of submersible pumps under 50m3/h at Thanh Thai Motor

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Frequently Asked Questions

Why does a submersible pump, while pumping water strongly, suddenly experience a drastic drop in flow rate, with water only trickling out?

This phenomenon is mostly caused by the bottom strainer being blocked by debris (plastic bags, rags, leaves), or by hair and debris wrapped around the impeller, narrowing the water compression space. With a discharge flow rate under 50m3/h, the suction force of the machine very easily pulls surrounding impurities to cling to the bottom. You need to pull the pump up to clean the strainer and remove debris from the impeller chamber.

Should this line of wastewater submersible pump be used to pump thick sludge at the bottom of shrimp ponds or construction foundations?

No, if it is a closed or semi-open impeller line. The pump line with a flow rate under 50m3/h typically can only pump clean water, grey wastewater, or diluted sludge with small impurities. If you intentionally pump thick sludge, the sludge will adhere tightly, jamming the impeller, causing electrical overload and burning out the motor. To pump thick sludge, you must choose a specialized sludge submersible pump with an agitator underneath to break up the sludge before pumping.

Why is it often recommended to install a check valve on the discharge pipe right above the pit opening when installing this type of submersible pump?

To prevent backflow and water hammer phenomena. When the pump stops operating, the entire volume of water that has not yet escaped in the vertical pipe will flow back into the pump chamber. If there is no check valve to hold it back, this amount of water will cause the impeller to rotate backward at high speed, easily loosening the impeller locking nut, damaging the mechanical seal, and causing a loss of priming water for the next running cycle of the system.