Main shut off valve tag

Recently we had a call with a burst pipe. It was early in the morning and because we had been already in the job we could not honor the call. But we gave a short information off the think what has to be done to stop the leak. We hope we helped with our information. And sorry we could not help more.
The important think what we have to mention is in case of burst pipes first think what you have to do, before to call the plumber is to turn off the main shutoff valve. This can be in utility room, in other room where you have small door in the wall, or any other place in the basement. Like homeowner you must know about this and you will avoid major damage in your house. Few plumbing companies live tags in each valve and mention for what is.