You want know repair broken shut-off valve? Exactly, about this I and tell in current article.
First there meaning find specialist by fix ball valve. This can be done using finder, let us say, yandex or any forum. If price repair you want - consider problem possession. If this option you not suitable - in this case you have practice mending ball valve own forces.
So, if you decided their hands repair, then first necessary get info how repair shut-off valve. For it one may use yandex or mail.ru.
I think this article least something helped you fix shut-off valve.
