grundfos sqflex [RE-wrenches]

[Allan Sindelar]

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

> when running a SQ flex horizontally do you need to sleeve it?
> Pump will be in a pond.
> thanks,
> jay
> peltz power


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