[RE-wrenches] Water system with Grundfos SQFlex

[Allan Sindelar]

The Ford Meter Box company in Wabash, Indiana made these in the photo. 

This photo has my leftover stock - 6 couplers, 1 connector to mate to 3/4” fpt and 2 connectors (1 new, 1 apparently installed but never used) to fit 1” fpt. All of these fit 3/4” SDR9 poly pipe. 

Contact me off list for a good deal on this lot of fittings. 

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Allan Sindelar
Allan at sindelarsolar.com

> On May 27, 2024, at 12:40 PM, jay via RE-wrenches <re-wrenches at lists.re-wrenches.org> wrote:
> 
> HI Brad,
> 
> Is this off/on grid?
> And are the two wells near each other or they just join up at the tank and float switch?
> 
> If you’ve got the power then I’d install just a standard AC centrifugal pump.  Sure uses more power but lasts forever. And is maybe $500 vs $2500
> And you’ve said minimal water use.
> 
> since you switch back and forth you could use a DPDT relay to use the reverse logic float which the CU200 requires.
> 
> 
> 
>> On May 27, 2024, at 12:23 PM, Bradley Bassett via RE-wrenches <re-wrenches at lists.re-wrenches.org> wrote:
>> 
>> OK, all of the fittings were just fine. After pulling the pump it was obvious that there was a total failure of the Grundfos SQFlex 3SQF-2 pump head, both the rotor and the check valve. Water just pours through it in reverse with no pressure. On the last test in place it would not produce more than 75psi running on 240VAC deadheaded. This pump is only 10 years old and only served a two person household with minimal water use on AC power, so it did not run anywhere near as many hours as a solar pump. 100psi head. I'd buy a different pump if I could come up with a method of control. Float switch is 1200 ft away (half AWG#16 and half AWG#14) and a second SQFlex pump in the other well so I'd have to figure out how to control both pumps. I do switch from one to the other; they do not run at the same time. Remember that these float switches are reverse, close on high water.
>> 
>> Back when I sold these, the pump head was not available separate from the motor, anyone know if that is still true?
>> Anyone have a good source for these? I'll look of course, but first hand knowledge from anyone here is good.
>> 
>> I do also have a backward leaky check valve in the pump house which will be a lot of work to replace. I have a problem with cheap unions leaking also, but they do come in handy in cases like this. I might just cut through one of the pipes and put in a union. Otherwise I have to disassemble a lot of plumbing.
>> 
>> Living in the country...
>> 
>> Thanks,
>> Brad Bassett
>> 
> 
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