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Cary, you helped me a lot last year with my well and I installed a cycle stop valve and cycle sensor and they both have been working great.  We are finally doing some landscaping around our house and I want to put in a small vegetable garden.  I want to use drip irrigation for the landscaping and vegetable garden.  At most, I will have 200' of irrigation lines with emitters, and from what I have read online, each 100' consumes only 0.5 gpm.  This is a homeowner system and I just want to run it off a hose bib, as I have done in a previous house that we had.  Rather than running a supply line to a hose bib on the side of the house, I want to use the hose bib (hydrant) that is mounted to the tee on the top of the well seal. I'm in a warm climate and don't have a pitless adapter and there is a tee on top of the well seal that supplies the house and the hydrant (sorry, can't figure out how to get a photo attached to my post). 

When I turn on the hydrant on the well, there is no switch of any kind connected to the flow coming out of the hydrant to turn on the well pump, and water comes out of the hydrant weakly… 1 gpm….so I’m guessing that water is flowing backwards, out of the pressure tank, through the bypass of the CSV and back down towards the well, where it comes out the hydrant… that correct?  And then, when the pressure tank drains enough, the pressure switch at the pressure tank turns on the well pump, and water starts gushing out of the hydrant.

But, when I’m using my proposed drip irrigation system, it will only consume about 1 gpm. 

QUESTION: So when the well pump is not running and the drip irrigation is being fed by the pressure tank only, is that going to be enough pressure to push water through the restrictions of the flow emitters of the drip irrigation system?

QUESTION:  When the pressure tank finally drains and the pressure switch turns on the well pump, will the well pump gradually fill the pressure tank again, while the 1 gpm flow is going to the irrigation system? 

QUESTION:  Is the CSV functioning when only the well hydrant is being used in this manner?

QUESTION:  Would I be hurting my well pump with this system?
My parents are retiring to the cabin and it’s time to update the well. The cabin will we I occupied from late spring to early fall. The current set up is a 1 1/4 galvanized pipe with a point approx 16’ down. I have a 17 yr old craftsman 1/2 hp shallow well jet pump. It’s on top of a 30/50 20 gallon tank. The pump is currently 115v, it’s aprox 20’ of cable to the outlet. The tank is loosing pressure, the jet pump sounds terrible and it struggles. Here is what I want to set up:

I have seven fixtures= 7gpm
I want to increase to 3/4 hp
I am debating between Gould 3/4 or red lion 3/4
I want to remove the old tank and install cycles top system
I am debating running a 240v
Should I stay with 1/2hp or increase to 3/4hP?
Gould or red lion?
Is cycle stop good for my application?
Is going to 240v worth the extra cost and time?
Applications / Re: My setup is a bit different
« Last post by Cary Austin on May 14, 2020, 06:45:16 AM »
That is a  very good question.  You can still leave the CSV set for 50 PSI and use a 40/60 switch setting.  The CSV will hold 50 PSI constant as long as the pump can do that as well.  But when demand increases and the pressure drops below 50 PSI, the CSV just turns into a piece of pipe and does nothing. You can still get your 9 GPM, but the pressure will only be 40 PSI as that is all the pump can do.

And yes a larger pump would keep the pressure up.  You can install a pump as large as you think you need, and the CSV will make it act like a smaller pump when smaller amounts of water are being used.  But you must have a pump large enough for peak demands as the CSV cannot make the pump act larger than it is.
Applications / Re: My setup is a bit different
« Last post by reddog on May 14, 2020, 12:09:07 AM »
Thanks for the fast answer! It is good to know that 'nothing untoward happens'. Just a FYI, the MQ comes with a check valve factory installed in the discharge port and an optional check valve to install in the suction port if the pump is drawing from depth. I have only the discharge port check installed.

Now for my next question. Looking at the pump curve of the JP07, the output at 50psi is about 7 gpm, am I reading that correctly? If I need more than 7 gallons at full system load (all my sprinklers on at once, which I would prefer to do, approaches 9gpm), does that preclude setting the pressure switch at 40-60 and setting the CSV at 50psi? The curve chart I have shows the JP07 producing about 13gpm at 40 psi, so I would guess that a CSV setting at about 40 would be better and the pressure switch at 37-57 would be what I want? I guess I'm unclear as to what the CSV does, if anything, when the demand exceeds the amount the pump can supply at its pressure setting. There's a reason I'm not a plumber, and you'll probably tell me if I want 9gpm at 50psi to just get a JP10 ;D
Applications / Re: My setup is a bit different
« Last post by Cary Austin on May 13, 2020, 03:48:56 PM »
Wow!  You have gotten more out of an MQ type pumps than most people.  But you are on borrowed time now.   I think the MQ has a built in check valve?  If not it must have an external one. 

Back pressure from a CSV would only be seen in the pipe between the pump and the CSV, not on the suction line.  Plus a JP07 can only build 76 PSI max, which would be the back pressure on the 6" long nipple between the pump and the CSV. 

Applications / My setup is a bit different
« Last post by reddog on May 13, 2020, 01:15:29 PM »
I've got a 3hp deep well (pump set at 785 ft) pumping about 10gpm, and after burning a start winding after 7 years I decided that it wasn't a good idea to be cycling the pump to pressurize an 86 gallon tank, especially when pulling and replacing the pump is a $4000 operation. I installed a 1500 gallon reservoir with float control, and now my pump runs a fill cycle only once every 3-4 days during low use periods and once a day, if that, when I'm irrigating. My well discharge is 1 1/4 inch and is fed into a fitting near the bottom of my partly buried (freeze protection) reservoir tank. There is a Tee tapping that line and a 1 inch suction line to an MQ3-35 in my wellhouse, with a 1 inch discharge to my domestic system and sprinklers. This has worked just fine for 7 years, but I am well aware that, even if nothing goes wrong with the pump itself, that the electronics on the circuit board are likely to fail at anytime. I'm considering replacing the MQ with a small pressure tank, Grundfos JP07 jet pump and CSV, but I am concerned about the CSV back pressure to that Tee on the well pump discharge, and what effect that will have (if any) on the well pump if it is filling the tank while the jet is running. The only check valves in the system are at the well pump. Thanks in advance.
Valve Tech / Re: CSV1A leaking at screw on top of spring cage
« Last post by Cary Austin on May 10, 2020, 07:20:31 AM »
Not really.  It tightens against the rubber diaphragm, so just enough to keep it from leaking.
Valve Tech / Re: CSV1A leaking at screw on top of spring cage
« Last post by KirkAlm on May 08, 2020, 07:09:14 PM »
Is there a torque value recommended when reinstalling the spring cage?
Irrigation / Re: Middle Georgia Area pump/irrigation guy recommendations
« Last post by Cary Austin on May 06, 2020, 04:04:22 PM »
I sent you a private message with Larry's phone number.
Hi Cary,

Yes please pass on his info if you will and thank you for the reply.
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