At only 3 inches in diameter, the Grundfos SQE submersible pump is extremely compact and ideal for small or restricted wells. In addition to the features and benefits shared with the renowned SP submersible pump, the SQE offers a number of motor protection and wear-reducing features that makes it the obvious choice for groundwater pumping. Suitable for domestic or small waterworks, and small irrigation systems.SQE pumps are equipped with a Grundfos Smart Motor. Like the SQ models, SQ pumps have a high efficiency permanent-magnet motor - but with the added ability to communicate.