[RE-wrenches] Pump ideas

[Chris Worcester]

Hi Jay,

If it hasn’t been mentioned yet, a surface pump will break suction or cavitate if too high from the source, so I’d put it in the hole so it’s not more than 6’ to 9’ above the static water level in the well. You will need a way to prime the pump too.

 

Chris Worcester

Solar Wind Works

NABCEP Certified PV Installer

Office 530-582-4503

Cell 530-448-9692

Fax 530-582-4603

www.solarwindworks.com

chris at solarwindworks.com

 

From: RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Brian Teitelbaum
Sent: Wednesday, August 03, 2016 9:40 AM
To: RE-wrenches
Subject: Re: [RE-wrenches] Pump ideas

 

Jay,

 

Is that 140 “feet” of head, or really 140 psi (about equal to 323 ft of head at sea level)? I’ll assume the 140 psi

 

And I’ll assume that you want to run the pump PV-direct, without batteries or an inverter.

 

Can the “well” be dug deeper? If they can dig it out another few feet or so, creating a deeper pool, that would keep the drawn-out water much cleaner 

 

You might want to look at the Grundfos CRFlex surface pumps. They have motors with the same AC/DC voltage specs as the SQFlex pumps, but they also have a control panel where you can adjust the motor speed. These pumps do have higher water flow-rate specs, but maybe you could adjust it down enough to get the 3-4 gpm rate. According to the pump chart, the CRFlex model 1-17 will pump about 4 gpm at 328 ft of head with about 750W of power. Unfortunately, I don’t have enough experience with these pumps to know for sure about the ability or limitations of adjusting the motor speed,  but I am looking for a Guinea Pig. (If any of you fine Wrenches out there have any experience with adjusting the CRFlex motor speed, please contact me off-list) 

 

Jay -  contact me off-list if want to discuss using one of these pumps.

 

Brian Teitelbaum

AEE Solar

 

 

 

From: RE-wrenches [mailto: <mailto:re-wrenches-bounces at lists.re-wrenches.org> re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Jay
Sent: Tuesday, August 02, 2016 9:44 AM
To: RE-wrenches
Subject: [RE-wrenches] Pump ideas

 

Hi all

 

I've got a pump choice question

 

140psi lift

3-4gpm max

12' suction out of shallow well

2' water depth in well

2' diameter well

Slight sediment, clay mostly. 

 

120/240vac power 

 

Submersible won't work, too shallow

Slow pump I'm concerned about filter changes

Surface pump makes most sense. 

 

Any recommendations?  

 

Thanks 

 

Jay

 

 

 

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