grundfos sqflex [RE-wrenches]

[Walt Ratterman]

Hey Jay,

We did just what Windy suggests in Benin, Africa, when we were sucking water
from a river.  Not exactly a pond, but close.  We used 6" pvc well casing
pipe, drilled 100 - .5" holes in it, wrapped it in fabric, jammed it into
the riverbed, fastened it to a "bridge" across the river with rebar, and
lowered the suction assembly into it.  (In this case, we had a centrifugal
pump on shore, but the same principal would work if we were installing a
submersible pump.)

Let me know if you want any pictures - crocodiles and all....

See ya,

Walt

-----Original Message-----
From: Windy Dankoff [mailto:windydankoff at mac.com] 
Sent: Monday, June 23, 2008 2:50 PM
To: RE-wrenches at topica.com
Subject: RE: grundfos sqflex [RE-wrenches]



Jay,

I just noticed Bob-O's reply, which reminds me -- You can reduce  
intake of debris and provide a sleeve at the same time. Here is the  
best idea I know for the job.

Get a piece of plastic 5 or 6" pipe, perforated or slit. Ideally it  
would be a scrap of actual perforated well casing -- that would have  
sufficiently narrow slits for the purpose, sized for the needs of a  
normal well pump in earth.

Of course you need to seal the ends. One end has a simple cap. The  
other end needs a pass-through fitting for the drop pipe. You can make  
that using a compression fitting that's sold for pipe repairs (fits  
over the pipe's OD). With threaded adapters and reducers, you can make  
that up so that it forms a scew-off end for the sleeve. Passing the  
cable through is next, but it doesn't have to be leak-proof, so just a  
snug hole is OK.

Ponds grow algae, so the next stage of protection is to wrap the  
sleeve with about 5 layers of black weed barrier fabric -- the black  
fuzzy coarse fabric that landscapers lay down before gravel, to stop  
plant growth. That has been known to work well in some troubling  
conditions. In your case, the finely-slit casing section is probably  
adequate since bits of algae are not abrasive and generally don't pose  
a problem.

Site conditions vary, and so does my memory, but this is general  
advice that I hope is helpful.

Windy

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