Irrigation well is not working properly


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Old 05-26-21, 07:16 AM
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Irrigation well is not working properly

I had a well pump that was producing 5 gallons a minute in 2020. The system worked fine for watering my lawn. At the end of the season the pump failed. In December I had the pump removed and hydrofracted the well. The yield was over 10 gallons a minute. Then I had a new pump put in that produced 10 gallons a minute. At that time, I also replaced the pressure switch with a 40-60 with a lever. The old one did not have a lever. I have a 20 gallon tank. There never was any backflow valve in the system. Now I can't irrigate my lawn even using the old watering settings. The pressure switch shuts off after a period of time. I have adjusted the pressure switch turning the larger spring clockwise perhaps five full turns.

Does anyone have any ideas?
 
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Old 05-26-21, 07:37 AM
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" Now I can't irrigate my lawn..."
What does that mean? Why can't you irrigate your lawn? Is the pump running but no water comes out? Is the pump turning off when it should remain on?

"The pressure switch shuts off after a period of time."
Is the system up to pressure when the switch turns off the pump?

What type pump do you have? Is it a submersible with the pump down in the well or is the pump above ground?
 
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Old 05-26-21, 08:54 AM
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" Now I can't irrigate my lawn..."
What does that mean? Why can't you irrigate your lawn? Is the pump running but no water comes out? Is the pump turning off when it should remain on? The pressure switch cuts out to zero pressure.

"The pressure switch shuts off after a period of time."
Is the system up to pressure when the switch turns off the pump? From my limited knowledge it is below the pressure on the tank (38 PSI).

What type pump do you have? Is it a submersible with the pump down in the well or is the pump above ground? Submersible.
 
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Old 05-26-21, 09:15 AM
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A few pictures of your setup can be very helpful...... how-to-insert-pictures.

Is there a pressure gauge there...... what does it read ?
 
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Old 05-26-21, 09:26 AM
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if the pump comes on with the lever until pressure builds up then its likely just an adjustment to the pressure switch or air bladder tank pressure if applicable if the pressure falls to low before the pump kicks on you will always have to use the lever to restart it.
 
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Old 05-26-21, 12:58 PM
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Photos

Here are the photos. At this time the pressure is 57 PSI. After it drops to zero and I move the lever, it gurgles a bit and when I am lucky it works its way back up to around 60 PSI.




 
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Old 05-26-21, 01:43 PM
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The tank has 38 PSI. It looks like I need more words for this to post.
 
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Old 05-27-21, 04:08 AM
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Are you saying that the pump fails to start as you run the sprinklers and the pressure drops from the 57 PSI shown all the way to zero?

You might have a bad pressure switch or the wrong kind of pressure switch. It is supposed to turn the pump on at around 40 PSI.
 
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Old 05-27-21, 05:41 AM
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What does this mean: "when I'm lucky it works its way back up"? That should happen every time, if there's water in the well and power to the pump.

When you (gently) lift and hold the lever, the pump should start. You hold the lever until enough pressure builds to "take over" and hold it in place without your help.

If you lift the lever to vertical, that's the OFF position. In passing from the horizontal to vertical, the switch and pump will engage for a moment. I've seen people think that it's supposed to keep running when that happens, but they are actually turning it off instead. Easy to misunderstand if your previous pressure switch was one without the lever.

 
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Old 05-27-21, 07:07 AM
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I. Mullins, I understand that. I had seen it in operation with the cover off.

I emptied the tank this morning with the power off and checked the pressure. It was about 43 PSI. I lowered it to 38 PSI. The irrigation system was off from last night's rain because of the rain sensor. I'll see what happens the next time programs B and C are operating. Maybe that will help.

Weeks ago the pump installer looked at my system after I told him that I had problems. He said that a lever pressure switch was wrong and I needed a check valve. Does that make sense?
 
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Old 05-27-21, 07:17 AM
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That will probably do it if the cut in pressure is still 40psi. I think you said that you adjusted it. The air pressure in the tank MUST be below the cut in pressure of the pump. If the air pressure is higher, the tank will push all the water out of the tank before the pump kicks in. Since a pressure tank cannot exert pressure on water that is not in the tank the water pressure will drop to zero. When that happens your safety switch will permanently shut off your pump until you manually bring it back with the lever.

So when you try it again keep an eye on where your new cut in pressure is, since you said you adjusted it. It is important to know so you can maintain the proper air pressure in the tank.
 
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Old 05-27-21, 09:09 AM
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OptsyEagle, Now I am optimistic. I'll post how it goes.
 
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Old 05-28-21, 02:58 PM
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First day went well. The top pressure stays at 65 PSI at rest. Should I dial back counterclockwise the larger spring in the controller?

I'll see if the next couple cycles go.
 
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Old 05-29-21, 07:17 AM
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What is the cut in pressure where the pump turns on. The pressure where your pump turned off is not really relevant to your problem. If the cut in pressure is above the air pressure, I would leave it alone. If it is below the air pressure I would probably just remove some air. Optimally the air pressure will be about 2-3 psi below the cut in pressure of the pump. That will give you the most water between pump cycles without the pressure drop to zero before the pump can turn on.
 
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Old 05-29-21, 04:58 PM
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It has been raining here so that the irrigation system is off for a while. I'll check the readings when it is back on.

Would a check valve do anything good for me?
 
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Old 05-29-21, 05:46 PM
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should already have a check valve or maybe more than one depending on how deep the well is so unless you have a bad check valve I dont see why you would need one.
would just monitor cut in pressure and see how much the pressure drops before starting to rise while your using water the off position of the switch is likely only 10 psi lower than the cut in so if you was using water and the pump comes on at 40 psi if it fell below 30 it would probably need to be restarted by the lever.
 
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Old 06-02-21, 07:36 AM
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It stopped raining and Program A went on. It did complete. I watched the gage for about 12 minutes. It stayed on 70 PSI. So, I do not know what the cut in point is. I'll try again tomorrow if it is not raining and see if that changes. I have a feeling that the spring setting is too tight.
 
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Old 06-02-21, 07:40 AM
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Yes, 70 psi is way too high for most residential irrigation systems. Normally the emitters are designed for about 30 psi.
 
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Old 06-02-21, 04:23 PM
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Any idea as to how I can get the pressure switch back to the factory settings? I think that would be my best bet and then make any adjustments I need from there.

For example: Tighten the large spring fully and then back it off a set number of turns.

Square D on 40 off 60 9013FSG2J24M4
 
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Old 06-03-21, 04:46 AM
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Measure the pressures and adjust as necessary.
 
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Old 06-16-21, 07:48 AM
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It is functioning well now. Thanks everyone for your help.
 
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Old 07-13-21, 09:56 AM
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Working, sort of.

It did stop with a zero pressure reading on the tank. With the tank empty the pressure was above where it should have been. I reduced the pressure and moved the lever on the controller and got the tank to refill and then it worked.

So, the pressure in the empty tank was set right. Then after some time it increased apparently over what the controller was set for. Would that mean that the tank has an internal leak in the bladder and needs to be replaced?

It has been raining a lot here so the system has not been running for over a week.
 
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Old 07-18-21, 08:00 AM
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Is my well tank leaking?

I had posted this at the end of a previous thread but got not responses.

I have an irrigation well that is controlled by a controller pressure switch on my tank. After a period of time, maybe weeks the system stops working with a zero pressure reading on the tank. With the tank empty the pressure was above where it should have been. I reduced the pressure and moved the lever on the controller and got the tank to refill and then it worked.


So, the pressure in the empty tank was set right. Then after some time the tank pressure increased apparently over what the controller was set for. (Measured when empty.) Would that mean that the tank has an internal leak in the bladder and needs to be replaced?



Moderator note:
Threads combined for better continuity and to eliminate asking all the same questions again.
 

Last edited by PJmax; 07-18-21 at 06:27 PM.
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Old 07-18-21, 08:39 AM
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With the tank empty the pressure was above where it should have been.
Please explain as this does not make sense.

You mention tank pressure several times. Keep in mind that there are two pressures and you need to say which one you are talking about. One is the air pressure and it can only be checked when the system is off and ALL water pressure has been removed (open a faucet or zone until all water stops flowing). The other is the water pressure and it will vary depending on it's point in the cycle. Usually it's something between 40 and 60 psi for example.
 
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Old 07-19-21, 02:58 PM
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I am referring to the pressure in the tank when empty and with the pump circuit breaker off measured with a tire gage at the top of the tank.
 
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Old 07-19-21, 11:25 PM
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possible the bladder could be leaking you did not really state what it was initially set to and how much it went up.
suspect there may be another possible cause for it going up do to higher ambient temps than when you set it initially since its an outdoor tank and ambient temp can have some effect on the pressure but it shouldnt be much 2-3 psi
 
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Old 07-20-21, 09:04 AM
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Good idea, I think that it might have gone up about 5 PSI. I'll check later and note the temperature.
 
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Old 07-22-21, 07:33 AM
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I tested this morning. The air temperature was around 70 degrees. The empty tank with the pump power off and the valve to the sprinklers closed read 35 psi on my tire gage at the top of the tank. I added air to bring it to 38.5 psi. It is looking that the air temperature may have caused the higher reading before. The air temperature when I reduced the pressure could have been as high as 85 or 90 degrees.
 
 

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