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 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.

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

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