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Valve Tech / Re: CSV 125 50psi failing
« on: May 10, 2025, 10:12:18 AM »
A 12 GPM pump will actually put out about 17 GPM running wide open like that. Again, below 50 PSI the CSV is just a piece of open pipe.
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Valve Tech / Re: CSV 125 50psi failing
« on: May 07, 2025, 06:45:50 AM »
NO! The CSV125 doesn't have much restriction until 50 GPM is used. With the CSV installed you cannot test how much the pump will produce because the CSV will only let out as much as your faucet will at 50 PSI. The faucet only lets out 5 GPM at 50 PSI. If you open enough faucets or big enough valve to get the pressure down to 40 PSI the CSV will be wide open and you can test how much the pump is producing, just not from a single little faucet. The faucet is restricting the flow, not the CSV.
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Valve Tech / Re: CSV 125 50psi failing
« on: May 06, 2025, 06:59:55 AM »
I don't understand your test and I don't see a problem. The CSV is maintaining 50 PSI constant as it should. The 120 PSI back pressure just means you could open another faucet or two and still have 50 PSI constant as the back pressure comes down to signify more usage. All you are testing is how much water can go through the hose bib at different pressures. At 50 PSI constant you can only get 5 GPM through the hose bib. Without the CSV the pressure is higher and you get more flow through the hose bibb. But if you restricted the hose bibb to 5 GPM as before, the pump would cycle on and off without having the CSV.
Re-reading back to 2023, I don't think there was a problem there either. When running two sprinklers the pressure dropped to 32 PSI, and I don't see how the back pressure could have been 120 PSI. That is because when you open enough hose bibs to get the pressure below 50 PSI, the CSV just turns into a piece of pipe. At 32 PSI the back pressure should have been about 40 PSI because you were using all the water a 3/4HP, 12 GPM pump could supply.
If when you open enough hose bibs to bring the pressure below 50 PSI, the back pressure on the CSV should drop to almost the same. As long as the CSV is holding 50 PSI as it should, it is doing its job.
Now if you want more pressure the CSV125 also comes in 60 PSI, but I think you are out of pump and need a larger one for what you are doing.
Re-reading back to 2023, I don't think there was a problem there either. When running two sprinklers the pressure dropped to 32 PSI, and I don't see how the back pressure could have been 120 PSI. That is because when you open enough hose bibs to get the pressure below 50 PSI, the CSV just turns into a piece of pipe. At 32 PSI the back pressure should have been about 40 PSI because you were using all the water a 3/4HP, 12 GPM pump could supply.
If when you open enough hose bibs to bring the pressure below 50 PSI, the back pressure on the CSV should drop to almost the same. As long as the CSV is holding 50 PSI as it should, it is doing its job.
Now if you want more pressure the CSV125 also comes in 60 PSI, but I think you are out of pump and need a larger one for what you are doing.
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Pumps, Wells, Tanks, Controls / Re: Booster Pump
« on: March 31, 2025, 01:52:44 PM »
Yes, you can easily add a pump to boost the 44 PSI gravity supply to 60 PSI or whatever you want. But we would need to know the flow rate required by the "high flow" demands to size a pump.
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Valve Tech / Re: Pressure between the pump and CSV
« on: December 09, 2024, 08:53:17 AM »
With the CSV1A adding additional back pressure it can make the pump think the well is deeper. So, you should be fine as is. But if you get a chance to change it the 1HP motor is fine, even with a 3/4HP pump end. You could put a 10 GPM, 3/4HP pump on the 1HP motor, or replace the 10 GPM, 1HP pump end with a 15-18 GPM, 1HP pump end.
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Valve Tech / Re: Pressure between the pump and CSV
« on: December 06, 2024, 12:36:14 PM »
The back pressure to a Cycle Stop Valve is always whatever the pump can supply. Looking at the curve for the 10 GPM, 1HP pump you mention it has a shut off head of 450'. Subtracting the 40' for the static level leaves 410' or 177 PSI back pressure. That is not too much for the CSV1A but is for the CSV125.
That pump is really designed for a well with water at 200' or more. The back pressure from the CSV is needed to keep that pump from upthrusting, as it is in a much shallower well than it was designed for.
A 15 or 20 GPM, 1HP would be better suited for a 40'-60' well and would only have 80-120 PSI back pressure.
That pump is really designed for a well with water at 200' or more. The back pressure from the CSV is needed to keep that pump from upthrusting, as it is in a much shallower well than it was designed for.
A 15 or 20 GPM, 1HP would be better suited for a 40'-60' well and would only have 80-120 PSI back pressure.
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Applications / Re: plumbing question for csv
« on: August 07, 2024, 08:58:30 AM »
If you have a tight fit and then tighten a union it can pull on the CSV. If the pipe in the ditch after the CSV settles and drops, it can put the CSV in a bind by bending it. The CSV1A is much stronger and impossible to plumb in a bind. It is also much shorter and you would not have to double elbow around. The CSV1A would just fit on the pipe before it goes underground.
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Applications / Re: plumbing question for csv
« on: August 05, 2024, 06:40:05 PM »
Not much room outside the well. To install it there you may need to go straight out a foot or so with the CSV, then double elbow back to the pipe going underground. It the pump is set on plastic pipe you could also install the CSV125 in the well, just under the well seal. If it is steel pipe you would need the SS version CSVS125.
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Valve Tech / Re: Detailed dimensions of all o-rings in the CSV1A valve
« on: July 17, 2024, 04:57:18 PM »
Sorry. Couple of machines down so we all hands on deck until back on line. Try not to forget.
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Valve Tech / Re: Detailed dimensions of all o-rings in the CSV1A valve
« on: July 10, 2024, 01:07:55 PM »
Here is a link to the parts break down. Have to get my tech guy to find o-ring sizes.
https://cyclestopvalves.com/pages/csv1a-parts-breakdown
https://cyclestopvalves.com/pages/csv1a-parts-breakdown
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Valve Tech / Re: Detailed dimensions of all o-rings in the CSV1A valve
« on: July 09, 2024, 07:08:16 PM »
Sorry for your problem. But that is the first time in 30+ years that an o-ring has been the cause of a CSV failure. Like you saw it smashed in when it was too big, it is squeezed into a slot and should nor be able to move, break, or get out in anyway. We buy them from a local bearing and seal company right off the shelf. See if I can look it up. But would have been posted years ago if there had been a problem.
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Applications / Re: In well csv
« on: June 27, 2024, 03:50:57 PM »
The 10SQ05-160 can only make about 95 PSI max. If it is really 40' down to water don't set the pressure switch any higher than 40/60, as that is about all the pump can do.
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Frequently Asked Questions / Re: Will any existing well pump work with a CSV or do I need a special pump?
« on: June 26, 2024, 12:36:32 PM »
The CSV was designed to work with a standard full speed pump to replace those expensive, troublesome, and short lived VFD or variable speed drives. Actually most variable frequency controls also work with a standard pump. There is really nothing different about the pumps. Just the expensive VFD controller makes a good pump give troubles and not last very long.
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Valve Tech / Re: Adding more pressure to current installed cycle stop valve
« on: June 01, 2024, 05:33:22 PM »
Turn the pressure switch up first. With switch shutting off at 80 you can just tighten CSV adjustment until it holds 70.
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Valve Tech / Re: Question on our CSV1A
« on: May 07, 2024, 06:52:45 AM »
Glad you are happy again. Didn't think the bolt would work loose on its own, but will recommend tightening the jam nut from now on. Thanks.