The best test would be to first put at least a half million of them out in the real world working everyday. Then give people some means of sharing information with each other all over the world. Now just sit back and see what kind of complaints, and how many complaints you hear about.
Wait a minute. We have already done that! Oh but 2012 will only be the 19th year of waiting for the complaints about Cycle Stop Valves. Maybe that just isn’t long enough.
Search hard and you may find a complaint or two. But even these will be from a misapplication, or was the fault of another component, not the CSV.
Each unhappy customer will tell a thousand people. Happy customers will rarely tell anyone. Just Google (CU301, SQE, or Subdrive). These products have not been around half as long as the CSV and you will find dozens if not hundreds of complaints on the Internet about these devices.
Most of the complaints you will find about the CSV were written by the same person, with a misapplied CSV, and a grudge against anything he didn’t think of first. This just proves my point about an unhappy customer, because this one person has told well over a thousand people about his problems with a CSV. Even then the CSV didn’t destroy anything. He just claims that it increased his electric bill from 10 to 20 bucks a month. Which also proves that you can make anything fail in some way if you set up the test to make that happen.
But go ahead and “search”. List any you can find here so we can see them. You will see that the one unhappy CSV customer looks pretty foolish being the only one saying anything negative about Cycle Stop Valves. He is the kind of person who will show you a picture of his pump/motor with the spline stripped off and still try to tell you cycling is not a problem.
The only other negative things you will find is from pump installers or engineers who have never seen a CSV and are guessing that, “certain things might or should happen”.
19 years and counting, I guess they are still waiting for something bad to happen.