Ok, I'll reveal my ignorance. When everyone is referring to a "frozen" gate valve, are you referring to the tendency of gate valve stems to stick in place because they were operated all the way until the handle stops in either the open or close position and then left there for a long period of time so that when you try to operate it again, it does not want to move? Obviously if you want the flow stopped then you close it all the way but how many times do you come upon a valve that is in the closed position? I always instruct my customers first that they will be better served in general by replacing with ball valves but if they don't want to do that I explain that these valves should not remain completely open and that if they ever have to operate it, they should back off of fully open by 1/4 - 1/2 turn so that the stem will not stick in place over time. By far though, when I replace these valves, it is because I have been called for some reason that requires me to close them but discover that they will not completely shut off the water. I will only turn them so far because I have broken the stem on one years ago trying to get it to shut off. Since then I sell them a ball valve if it won't stop the flow or I turn it off at the street.
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Ok, I'll reveal my ignorance. When everyone is referring to a "frozen" gate valve, are you referring to the tendency of gate valve stems to stick in place because they were operated all the way until the handle stops in either the open or close position and then left there for a long period of time so that when you try to operate it again, it does not want to move? Obviously if you want the flow stopped then you close it all the way but how many times do you come upon a valve that is in the closed position? I always instruct my customers first that they will be better served in general by replacing with ball valves but if they don't want to do that I explain that these valves should not remain completely open and that if they ever have to operate it, they should back off of fully open by 1/4 - 1/2 turn so that the stem will not stick in place over time. By far though, when I replace these valves, it is because I have been called for some reason that requires me to close them but discover that they will not completely shut off the water. I will only turn them so far because I have broken the stem on one years ago trying to get it to shut off. Since then I sell them a ball valve if it won't stop the flow or I turn it off at the street.