Hi Eric
Well since I have the patent on the in well pressure tank, I should be able to help you. Lol. Flexcon just waited for my patent to expire and stole the idea, the same way they did WellXtrol years ago. I had licensed it out to another guy for several years, because I didn't want to make one of my own. Actually I did want to make one, I just could never be happy with the performance.
The tank on the market now only holds about 1/4 of a gallon of water. This is because it is not feasible to ship a tank long enough to hold a gallon or so of water. So they designed the tank to be easy to ship, not to work properly. Even when I was using those I always recommended adding an additional 4.5 gallon size tank somewhere else in the system. It is a leak of less than 1 GPM that becomes the problem. With the CSV and a tank that holds 1 gallon of water like the 4.5 size tank, less than 1 GPM leak is not a problem as the pump will cycle slowly. But with only 1/4 gallon of draw the pump can cycle itself to death fairly quickly.
So if I had power at the well, and didn't want to run power from the house, I would use the in well tank with the CSV125-1, but I would add an additional tank in the house somewhere. Especially when supplying things like cow troughs with float valves, you need at least 1 gallon of draw down.
Installing a CSV below the in well tank means it will be 10'-15' below ground. If set 15' below the surface, the CSV will regulate 7 PSI lower than if at the surface. So a 60 PSI CSV125 will only give you 53 PSI at the surface, and would work with a 43/63 pressure switch. If you start with a 50 PSI CSV the pressure would only be 43 PSI at the house. It doesn't hurt if the CSV125 is submerged, it will still work fine. Teflon tape only, as the plastic in the CSV125 doesn't like pipe dope. Call me if you have any questons.
On another note, I noticed some new replies on that other forum. The Engineering Forum finally figured out I was right after 10 years of being banned, and let me help on that site now. Do you think the Geo community has learned anything in all these years, and would appreciate some knowledgeable advice?
This is part of what the latest post said. I know others could benefit from this knowledge as well.
So for someone who like me who is a do-it-yourselfer and wants to keep things simple and inexpensive the cycle stop valve is a great product. My brother built his house about a year after I installed my system and he too has a Cycle Stop installed in his well system that has worked for 9 years flawlessly as they advertise.