If you’re in Southern Arizona, particularly in the county, you’ll likely find a cast iron water main valve cover set in concrete. It may be a little heavy and likely dirty, also watch for critters, dangerous wildlife, spider, scorpions and snakes. Plus you may want to use a screwdriver or wrench to grab hold of it or pry it open. Once in, look for a switch which you’ll turn counter-clockwise. You’ll want to turn it 90° in whichever direction it will turn, this closes the valve stopping any flow of water to the home. This you’ll want to do first before calling us, the pipe-pros at AIRZona | ZONAplumbing!