Hi feng
Thanks for the post. Our valve is called a disruptive product. The CSV eliminates pump cycling which makes pumps last longer and use smaller pressure tanks. So very few pump suppliers will recommend our valve as it knocks them out of selling big tanks, which are no longer needed, and makes everything last longer, so they don’t get to sell as many pumps.
Since you already have a pressure tank and pressure switch, all you need is one of our CSV1A valves. We have no one in your area that stocks these valves. So call us directly and we will be glad to help you. We take credit cards over the phone, but not off our web page.
Thanks
Cary
806-885-4445