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"
[1]https://offgridsolar1.com/ [2] [1]
e-mail [email protected]
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
<[email protected]> 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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