Broke valve? Decide this problem

Suppose, you was valve. Served it to you enough long. Here unexpectedly it fails. what to do in this case? About this you can learn from current article.
So, if you all the same decided own repair, then in the first instance there meaning learn how repair valve. For it one may use any finder, eg, yahoo.
Hope you do not vain spent time and this article least something may help you fix valve. In the next article you can learn how repair power supply or chainsaw.