SQN 3" submersible groundwater pump - continuous and intermittent operation



The BasicLine by Grundfos SQN is a small and compact submersible multi-stage pump designed for constant pressure operation in domestic applications. The motor of the SQN pump is a permanent magnet motor with a micro frequency converter ensuring optimum efficiency.

The built-in frequency converter features protective functions and soft-starting, which reduces starting current and gives smooth and steady acceleration and dry running protection. The SQN pump is handy and user-friendly due to its low weight and 3-inch diameter.


High Efficiency
The SQ pump is fitted with high efficiency permanent magnet motor that ensure lower running cost while providing higher starting torque to ensure the pump starts every time.

Excellent starting capabilities
The soft starter minimises the risk of wear on the pump and prevents overloading of the mains during start-up. Its softstart system also reduces water hammering, light flickering and other electrical disturbances.

Overvoltage and undervoltage protection
The integrated protection prevents damage to the motor in case the supply voltage moves outside thepermissible voltage range.

Overload protection
The SQN eliminates the need for motor protection. If the pump is exposed to heavy load the motor will automatically reduce its speed, or if the pump is blocked it automatically stops pumping.

Over-heating protection
As an extra protection, the electronic unit has a built-in temperature sensor. When the temperature exceeds a critical limit, the pump is stopped and when the temperature has dropped, the pump automatically starts.

Protection against upthrust
The SQN is fitted with an upthrust bearing protecting both pump and motor against upthrust, thus preventing breakdown during the critical start-up phase.


  • High efficiency
  • Compact, built-in electronics
  • Constant pressure option



Home & Garden Brochure

Home & Garden Brochure

Find out about the full range of pumps available for use around the home and garden - water supply, pressure boosting, wastewater & drainage, hot water & water circulation.

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