Common Problems of Water Pumps Not Sucking and Their Solutions

Water pumps are an essential part of water distribution systems in homes and commercial buildings. However, one common problem is that the water pump doesn't draw water as it should.
If left untreated, it can disrupt daily activities — the water won't rise, the pressure will weaken, and the pump could even fail.

Here are some common causes of water pumps not drawing water, along with solutions.

1. Leaking or Loose Suction Pipe
The most common problem is an air leak in the suction pipe. If there's even a small gap, air will enter and disrupt the negative pressure inside the pump, preventing water from being drawn in.

Solution:

• Check the suction pipe connections and ensure they are tight.
• Use sealing tape or quality pipe glue.
• If the pipe is cracked or brittle, replace it immediately.

2. Pump Not Filled with Water (Not Primed)
The water pump must be completely filled with water before using it for the first time, or after a long period of inactivity. If the pump is empty, there won't be enough pressure to draw water from the source.

Solution:

• Turn off the pump first.
• Open the fill hole (usually at the top of the pump).
• Pour water until it's full, then close the lid tightly and turn on the pump.

3. Water Level Too Deep
Each type of pump has a maximum suction capacity limit. If the water depth in the well exceeds the pump's capacity, water will not be sucked up even if the pump is running normally.

Solution:

• Check the well depth and adjust it to the pump's specifications.
• If the depth is more than 9 meters, use a jet pump or submersible pump designed for deep wells.

4. Stuck Valve or Foot Valve
The valve at the end of the suction pipe prevents water from flowing back into the source when the pump is stopped. If the valve is clogged with dirt or damaged, the pump will lose pressure and fail to suck.

Solution:

• Remove the foot valve and clean it of mud or sand.
• If the spring or valve is damaged, replace it with a new one.
• Use a brass or stainless steel valve for longer durability.

5. Damaged or Clogged Pump Impeller
The impeller is the propeller inside the pump that moves water. If the impeller is clogged with dirt or worn out, the pump's suction power will decrease drastically.

Solution:

• Disassemble the front of the pump and clean the impeller of dirt.
• If it's worn out, immediately replace it with a new impeller suitable for the pump type.

6. Unstable Electrical Voltage
Water pumps are highly dependent on electrical power. If the voltage is too low, the motor will not rotate optimally, making it difficult to draw water.

Solution:

• Use a stabilizer or AVR (Automatic Voltage Regulator) to maintain a stable electrical voltage.
• Avoid using the pump in conjunction with large electrical appliances such as refrigerators or washing machines.

Conclusion
A water pump that won't draw water is usually caused by simple issues such as leaks, stuck valves, or not primed. However, if you've checked everything and the pump still isn't working, you should contact a technician or consider replacing the pump with a suitable type.

PT Intisumber Bajasakti (ISBS) provides a variety of high-quality water pumps for household, industrial, and high-rise buildings.

We are ready to help you find the best products with professional and fast service.

📞 Phone: 021-66675999
🌐 Web: intisumberbajasakti.com
✉️ Email: info@intisumberbajasakti.com

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