I don't even want to talk about this. There are those that use the CSV's They tend to be the installers. Then there are those that don't like them, Of the people doing the most complaining, only one has tried one. I don't have many people that have offered to help out, that have the real life knowledge and experience that can help out. Valveman has those things going for him. Most of the questions that Valveman has been posting on, are just normal pump questions. Here we have a guy that works 24/7 on pumps, has been asked by the National Water Well Convention to conduct classes, and yet we have three non-professionals that want to run him off of "my" site? I'm not buying into that. If the "three" want to be experts on this, they can start their own site.