Q. Rafael, how can I avoid a costly plumbing emergency? A. First, know where your water shut-off valves are. You have your main shut-off, typically next to your water meter. Also, each fixture, such as your sink and toilet, will usually have shut-off valves for the plumbing in that section. Once you’ve identified these valves, make sure everyone in the home knows where they are and how to shut them off in case of an emergency. Shutting off the water in a timely manner can sa