said by robbin:said by NullQwerty:Is my only option here really to replace these valves?
Standard rule for me now is that if the cutoff valve is not a quarter turn valve it gets replaced when I work on the faucet, toilet etc. The quarter turn valves are worth the time involved and you don't want old, unreliable valves because in the emergency situation time is of the essence in getting the water turned off.
Happened to me last year, the line to the toliet tank bust when I was in my room reading and I'd hate to know what would of happened had I not been here...