Sprinkler Installation Companies Fundamentals Explained If you get on a local water system, you ought to find the size imprinted on the meter itself. If you can not situate it, search your utility expense or call your water carrier. Water meters are 5/8-inch, 3/4-inch or 1-inch (installing underground sprinkler system). http://martinbzvso.mpeblog.com/17479500/the-ultimate-guide-to-water-sprinkler-installation