Lol you guys are great! You guys know more about pumps and how a CSV works than 99% of "professional" installers. Everything you said is spot on. First I would try to develop the well or pump it out. Even 12 years means nothing if it has never been properly developed. It may take hours or days. You can pump it hard until dry, let it recover for a period of time, and pump it dry again, over and over until it cleans up. You can use a Cycle Sensor set for 20-30 minutes to recover, and just let it do that for days. It will either clean up or you will give up on it eventually. But it is worth a try, as it works most of the time.
If pumping hard doesn't work, the next option is to limit the amount used to keep from stirring up sediment. The amps on the Cycle Sensor can actually be set high enough to shut the pump off before the well runs dry if needed. In this case using a Dole valve with a CSV is preferable. The Dole valve limits the max flow to like 8 GPM, while the CSV will vary the pumps output from 1 to 8 GPM as needed when using water.
I am sorry you couldn't find what you wanted on my web page. I have written and posted hundreds of pages on many articles on this subject. Most of it is over people's heads, so they don't think I answered the questions. My answers are very technical in nature, and many pump engineers even call and ask questions.
I always thought "If you build a better mousetrap, people would beat a path to your door". I found out if you build a mousetrap so well that it could make mice extinct, people will do anything they can to discredit you and put you out of business, as there is lots of money in mousetraps. I started Cycle Stop Valves in 1993. The very first ones went to the major pump and tank manufacturers. I sat around the test pits with all their engineers and answered questions as best I could. I was really trying to get them to show me the flaws of a CSV, as I could not find any. The only flaw Goulds came up with was they were made with leaded brass. Leaded brass was normal back then, but the first lead propaganda was being published and Goulds was switching to low lead brass or other materials. Needless to say, I changed to low lead brass within a month and called Goulds to let them know. Then I get the run around. "Well we still don't know, we are still thinking about it." But a few weeks later the president of the company walked into my office and tried to buy me out. When I ask that he push the product and guarantee a modest increase in sales for a few years he wanted none of it. All he wanted was to buy me out, get control of the patents, and close me down.
Four years later I heard from an engineer who recently retired from Goulds. I found out the CSV had been blacklisted. The employees were told the CSV makes pumps last longer and use smaller tanks, and that any employee who mentioned a CSV would be terminated immediately. Over the years I have heard similar things from the other major pump manufacturers as well. Instead of taking on the Cycle Stop Valve, all these companies went to work on VFD's and tankless controls with a flow switch. They wanted something that could work similar to a CSV, but would not shoot their planned obsolescence in the foot. For pump manufacturers it is better to have something that is expensive, doesn't last very long, and doesn't make pumps last longer either. If every pump came with a Cycle Stop Valve attached, there would only be about 20% as many replacement pumps sold. If all that wasn't true these companies would use their big money and high priced lawyers to shut me up. But they don't want any of those engineers to testify under oath. People would find out that planned obsolescence is the number one design criteria for most manufacturers.
So, you are right to be suspicious. But you are being suspicious of the wrong person or company. Those pump companies didn't get to be so huge by helping make pumps last longer. They may claim all kinds of benefits to their pump over all others. But they know how to make them better, and they know adding a CSV would make them last about 400% longer. They just don't want you to know it. And there are so many out there claiming the CSV doesn't work as advertised or worse yet that it is Snake oil, they don't have to say a thing. If you listen to these ill informed instead of reading reviews of people who have a CSV, you will spend a lot more on your pump system and be out of water often. I don't post a review unless it has pictures, so no one can say I make those up as well. LOL!
Read a few hundred of these.
https://cyclestopvalves.com/pages/reviews
Boyce replied while I was typing. He is a one percenter. LOL! I am not kidding about only 1% of pump guys knowing what they are talking about. Thank goodness there are a few good ones on this forum. Thanks guys!
