grundfos sqflex [RE-wrenches]

Jay Peltz, Peltz Power jay at asis.com
Thu Jun 26 08:11:56 PDT 2008


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Hi Allan,

So you left the "bottom" open as the main water entry?

jay
peltz power
On Jun 25, 2008, at 4:01 PM, Allan Sindelar wrote:

>
> Jay,
> We recently installed a 1/2hp Grundfos SQ AC sub in a rainwater  
> tank, using
> a method recommeded by our well supply house. It is essentially  
> like Windy's
> advice. We used a 4' piece of 4" PVC well casing and a standard 4"  
> sanitary
> seal on one end. This gave us pipe and wire attachment and sealed  
> one end.
> It also allowed the intake water to flow over the pump, cooling it.  
> I glued
> a scrap of PVC casing inside the sleeve to hold the pump centered,  
> and set
> the sleeve on bricks to keep it above collected debris.
>
> Allan at Positive Energy
>
> -----Original Message-----
> From: Windy Dankoff [mailto:windydankoff at mac.com]
>
> Hi Jay.
> This is NOT advice specific to the SQFlex. I can only advise about
> submersible pumps in general. Here goes:
>
> When placing a pump in open water (pond, tank, dug well) as opposed to
> in a narrow well casing, there is not much water flow immediately
> surrounding the motor. Because of that, the motor may be susceptible
> to overheating. To aggravate the matter, surface water can get quite
> warm, further reducing the cooling effect. This is regardless of
> vertical or horizontal position. The fix is to place the pump in a
> sleeve of pipe or tube to simulate the water flow in a casing.
>
> The SQFlex has a more efficient motor than conventional pumps. It
> therefore produces less heat and I suppose it has a heat sensor built-
> in as well. So, I suspect that this may not be an issue. You may wish
> to seek further advice but I thought I'd fill you in on the reasoning
> at least.
>
> Windy
>
>>


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