This cheap plastic valve just cost me $206. It was the check valve on my deep well submersible pump. I was getting air in my water system and it was the culprit. The well guy removed this piece of junk and replaced it with a good brass check valve. My pump is a Jacuzzi SS 1.5 hp unit. It is now 8 years old. He said I can expect to get about 15 years and the cost of the same pump today is $1000. I dread the day I have to replace it.
I'll say one thing about my water well. I've had three wells in my life and this one is great. 400 feet deep with the pump at 300 feet and the water level is at 180 feet. The quality of the water is fantastic!!