3" SQ Grundfos 2-Wire

Deep Well Submersible Pumps

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Please inquire by phone (1-866-960-9621) for larger pumps

Call the sales department toll free if you need help selecting the proper pump for your application.
1-866-960-9621

The Grundfos SQ pump does not require a control box. Grundfos SQ pumps are commonly wired directly to a pressure switch in a cycling system. Pressure tank capacity for cycling systems should be a minimum of 3X the pump GPM to avoid short cycling.

Grundfos SQ pumps also come in many 1/2HP, 115 volt models that require only 10% over P1 to start. [example 1/2HP - (P1=1.02kw) x 110% = 1122 watts].
This is far less than most submersible pumps at start up making this pump selection your best choice when using on a generator.

NOTE: The MS3 motors for SQ pumps are built to withstand up to a 4000V transient spike (IEC 60664-1, Overvoltage category III). However, lightning can generate voltages that exceed this level, and additional transient protection devices are recommended to protect the submersible motor in areas with a high degree of lightning activity. The following transient protection device has been tested successfully together with the SQ pump, and can therefore be recommended: Delta Lightning Arrestors - Type LA 602.

Available from:
Delta Lightning Arresters, P.O. Box 750, Big Springs, TX 79721
Telephone: (915) 267-1000, fax: (915) 267-1035
Internet: www.deltala.com

Provides protection against transients as indirect lightning and surges (IEC 61643-1 Arrester class II, 8s/20s pulse, 15 kA peak current).

NOTE; Don't confuse feet in the graph with a measurement of depth to water or well depth. Feet of head is a calculation of several inputs (converted to feet) for a total calculation of vertical lift in feet required of the pump at a specific GPM.
Example inputs - [add 138 feet if you wish 60PSI available at the pump outlet or 2.3 feet X the PSI required]
Example inputs - [add pump down level (not depth of well] This is the distance in feet to the surface of the water while pump is pumping]
Example inputs - [add any additional vertical lifting in feet required to get water to its final outlet]
Example inputs - [add frictional losses from pump to final outlet in feet of head by using a pipe friction chart]
After a calculation of total head in feet has been made, simply go to a chart of the GPM required. Start by drawing a line straight up from the GPM required. Next go to the left side of graph, find the total calculation in feet and draw a line horizontally. The pump curve just above the intersection of your lines will be the pump that meets your calculation data.
Minimum wire size chart for (SQ/SQE models only!) should be used from the fuse box to pump. 

If you need help or have questions concerning your calculation please call our sales department at 1-866-960-9621

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