Internal (Submersible) Vs. External (Surface-Mounted) Water Pumps

Selecting the appropriate pump is critical for optimal water management in small and rectangular water tanks. This Poly Water Tanks blog clarifies the distinctions, advantages and disadvantages between internal (submersible) and external (surface-mounted) pumps to aid in your decision-making process.

Internal/ Submersible Pumps

Submersible pumps, designed to operate while fully submerged, offer unique benefits for specific applications. Here are some key points to consider:

Design and Operation: These pumps are immersed in the fluid they pump, aiding in motor cooling and providing a straightforward fluid movement path.

Advantages:
- It is ideal for deep water applications due to its higher efficiency.
- Reduced noise pollution as the pump operates underwater.
- Less space is required on the surface, suitable for small water tanks in compact areas.
Disadvantages:
- Potentially higher upfront costs compared to external pumps.
- Maintenance and replacement can be more complex, requiring pump retrieval from water.

Submersible pumps excel in efficiency and space-saving but consider the higher initial investment and maintenance requirements.

External/ Surface-Mounted Pumps

External pumps for water tanks are installed outside the water source and bring their own set of advantages and challenges. Key aspects include:

Design and Operation: These pumps are situated above ground and may need priming to start the water flow.

Advantages:
- Easier access for maintenance, repair and adjustments.
- Often lower initial costs, making them an economical choice.
- Versatile for various applications, from irrigation to water transfer.
Disadvantages:
- Increased noise pollution due to above-ground operation.
- It may require weatherproofing for outdoor installations.
- Less effective in situations where water needs to be moved upwards to higher points, such as multi-story buildings, due to the impact of gravity on efficiency.

External pumps offer versatility and ease of maintenance but may fall short in efficiency for specific tasks.

Which Pump Should You Choose?

The choice between submersible and external pumps hinges on your specific needs, considering factors like the water source’s depth, noise sensitivity and installation and maintenance flexibility. Both options present unique advantages and limitations. Speak to our team today for guidance on the best option for you out of our small, large, round and rectangular water tanks.