Pentair 263042 Check Valve CPVC for Pool Pumps, 2 Port Straight

Beware. I bought this Check Valve thinking it was a High end one, being a Pentair. Was I wrong. I purchased it, June 26th 2016. Installed it a couple of days later, which was June 29th. After the install I turned the pump on and off to see if it worked, and it was working perfect. I checked the next day as well, again no problems. On July 7th I anted to check it but the pump was running, flapper was open which was normal. Later after the pump shut off automatically, I went to look at it and I saw water in the pipe and I could see the flapper was open. I got a Philips Head screw driver, unscrewed the 8 screws and the clear plastic lid came off. I was in shock to be honest when I looked at the Flapper and the spring. Not only was the spring broken, snapped in half but it was so corroded. It did not seem possible I kept thinking. Maybe it was a defective unit or maybe it was not. Regardless the spring was corroded. A little over a week and it is broken, at a cost of $46.23 cents. My whole system is Pentair, including my Intelliflo variable speed pump. I bought the check valve as I have always had Pentair, as they never give me any problems. Amazon offered either a refund or replacement. I took the refund as I will no longer use the or any Chlorinator.I uninstalled the chlorinator too after cutting out the check valve. Now I see why Pool Heaters get destroyed if you use a Chlorinator, without a check valve. I will now go back to my old and trusty Floatable Chlorinator you put in the pool. No longer will I worry.