Brad,
Windy might chime in at some point to back me up on this but I see no
way for that pump to turn backwards.
Reverse flow is likely a leak at the pump, the down well piping or at
the pitless adapter if there is one.
Roy....
Another old time solar and wind guy, hoping to be retired someday :-).
Roy Butler
Four Winds Renewable Energy, LLC
8902 Route 46, Arkport, NY 14807
Education is when you read the fine print; experience is what you get when you
don’t.
“The less people know, the more stubbornly they know it.”
Although no trees were killed in the sending of this message,
a large number of electrons were terribly inconvenienced.
On 5/26/2024 10:10 AM, Dave Angelini Offgrid Solar via RE-wrenches wrote:
Hey Brad,
Sometimes shooting is best if you tell more on what you have done so
far like using the SQF shooting guide, especially on a holiday weekend😉
Assume there is a CU200 controller and pump is in ground still, must
be with 100ft head, sorry
No high amps? It runs, How old?
--Dave
*Dave Angelini Offgrid Solar "we go where powerlines don't"
<http://members.sti.net/offgridsolar/>https://offgridsolar1.com/
<https://offgridsolar1.com/><http://members.sti.net/offgridsolar/>
e-mail offgridso...@sti.net text 209 813 0060*
On 2024-05-26 4:26 am, Jay via RE-wrenches wrote:
Hi Brad
With 2 check valves leaking I’d look for a broken pipe or a corroded
fitting.
If there is anyway to isolate between the 2 check valves then you
could measure the pressure drop on both sides which should point to
the direction of the leak.
Jay
On May 25, 2024, at 7:41 PM, Bradley Bassett via RE-wrenches
<re-wrenches@lists.re-wrenches.org> wrote:
I have a water system with a Grundfos SQFlex SQF3-2 pump. I'm
getting water flow in reverse either through the pump or a leak up
to the pump. My question is if the check valve on the top of the
pump is not sealing, will the progressive cavity pump allow water to
flow through the pump in reverse? I'd think that with a positive
displacement pump it would not, except very slowly or if it turned
the motor backwards which I think would be very unlikely. There is
about 100 psi head on the pump.
I think it's most likely I have a leak somewhere in the plumbing,
and of course another failed check valve farther up in the plumbing.
It's possible to get failures even with redundant protection if you
have two concurrent failures, which I must have here.
Brad Bassett
Old time solar guy who used to do solar pumping back in the '80's
and '90's. Mostly retired now.
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