When installing an underground sprinkler system, the first tip is to check the home's water pressure and to see how much water an outdoor faucet delivers per minute. This is important information to send to a sprinkler manufacturer to receive the right parts, according to PopularMechanics.com. Another tip for installation is to place a flag or stake at every sprinkler location before digging.
Between these stakes or flags, run string to show where the irrigation pipes are going to run. When digging the trenches for the pipes, follow the string and dig to a depth of about six to 12 inches. Before doing any digging, make sure to know where gas, electric and cable lines are.