Grundfos SQ series ac pumps are the only pumps I've ever run across that run perfectly on just about ANY inverter over 1000w. if planning on running a well pump offgrid they are the only system I've ever seen that JUST WORKS. (for domestic use, irrigation is a different animal) Everything else requires overly complicated setups that often pump every gallon of water twice.
I think they should be a sticky in this catagory because every time I've recommended one to someone it was as a REPLACEMENT for the well pump they had already bought... that didn't work offgrid.
sq model numbers look like this 10SQ05-160 10=gallons per minute 05=1/2hp-160=rated head. their 1/2hp pumps come in 120 and 240 their larger pumps only in 240.
to determine what pump to buy, first decide how many gpm you want/need. I've personally never had a need for over 10gpm even in a 4 bath house. grundfos goes over 30 on the sq line. Next number you'll need is your static water level in the well. to determine rated head pressure needed add the depth to static water level in your well plus your desired water pressure. standard well pressure switches are 20/40 30/50 and 40/60 so if you had a well with a 70 foot static level and wanted 60psi @ your faucet your minimum head pressure would be 130. I like to add about 30 or more to this number as a margin of error. in this senario the above listed model would work fine. if the well was deeper you would need a higher head rated pump.
5gpm models
5 SQ15-450 (1)
5 SQ10-410 (1)
5 SQ10-360 (1)
5 SQ07-320 (1)
5 SQ07-270 (1)
5 SQ07-230 (1)
5 SQ05-90 (1)
5 SQ05-180 (1)
5 SQ05-140 (1)
10 gpm models
10 SQ15-330 (1)
10 SQ10-290 (1)
10 SQ07-240 (1)
10 SQ07-200 (1)
10 SQ05-160 (1)
10 SQ05-110 (1)
15gpm models
15 SQ15-290 (1)
15 SQ10-250 (1)
15 SQ10-220 (1)
15 SQ07-180 (1)
15 SQ07-150 (1)
15 SQ05-70 (1)
15 SQ05-110 (1)
I have no affiliation with grundfos just wish someone had mentioned them to me when I was staring out offgrid
I think they should be a sticky in this catagory because every time I've recommended one to someone it was as a REPLACEMENT for the well pump they had already bought... that didn't work offgrid.
sq model numbers look like this 10SQ05-160 10=gallons per minute 05=1/2hp-160=rated head. their 1/2hp pumps come in 120 and 240 their larger pumps only in 240.
to determine what pump to buy, first decide how many gpm you want/need. I've personally never had a need for over 10gpm even in a 4 bath house. grundfos goes over 30 on the sq line. Next number you'll need is your static water level in the well. to determine rated head pressure needed add the depth to static water level in your well plus your desired water pressure. standard well pressure switches are 20/40 30/50 and 40/60 so if you had a well with a 70 foot static level and wanted 60psi @ your faucet your minimum head pressure would be 130. I like to add about 30 or more to this number as a margin of error. in this senario the above listed model would work fine. if the well was deeper you would need a higher head rated pump.
5gpm models
5 SQ15-450 (1)
5 SQ10-410 (1)
5 SQ10-360 (1)
5 SQ07-320 (1)
5 SQ07-270 (1)
5 SQ07-230 (1)
5 SQ05-90 (1)
5 SQ05-180 (1)
5 SQ05-140 (1)
10 gpm models
10 SQ15-330 (1)
10 SQ10-290 (1)
10 SQ07-240 (1)
10 SQ07-200 (1)
10 SQ05-160 (1)
10 SQ05-110 (1)
15gpm models
15 SQ15-290 (1)
15 SQ10-250 (1)
15 SQ10-220 (1)
15 SQ07-180 (1)
15 SQ07-150 (1)
15 SQ05-70 (1)
15 SQ05-110 (1)
I have no affiliation with grundfos just wish someone had mentioned them to me when I was staring out offgrid
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