Lawns must be irrigated during hot weather so that the ground remains saturated for the grass to grow. The amount of water pressure in the home has an influence on the installation of an in-ground sprinkler system. However, if the home has low water pressure, there is no need to worry because there are several other things you can do to make your sprinkler system work.
You will need:
Step 1: Add a water pressure gauge to an outside water faucet to determine the pressure of your water, which is referred to as static pressure. This could be any figure from about 60 to 90 pounds.
Step 2: Conduct a gallon-per-minute test. Use the water pressure regulator to bring the pressure down to 30 psi. Determine how many gallons of water you receive at 30 psi. Each sprinkler head has a spring that requires 30 pounds of pressure to push up the sprinkler head.
Step 3: As an example, if you get 8 gallons of water at 30 psi and that will be your operating pressure for the sprinkler system. Different sprinkler heads put out a different number of gallons per minute. When the system zones are set up, do not exceed the operating pressure of the system within any one zone. In this example, no zone should be equipped with sprinklers that put out more than a total of 8 gallons per minute.
Step 4: Some sprinkler heads have interchangeable nozzles with the gallons per minute marked on the nozzles. These nozzles can be used to adjust the system to accommodate the operating pressure.
Step 5: The number of heads in each sprinkler zone is critical to installation of a new sprinkler system. If you do not base this on the operating pressure of the system, each sprinkler head will not operate at peak performance. For example, it may throw water out only 10 feet when it could throw water out 30 feet if the correct number of sprinkler heads were installed in each zone.
Step 6: If you use the proper number of zones, you can set up a system with nearly any amount of water pressure. A home with low water pressure may need to be outfitted with a high number of zones, each with only two sprinklers. The goal is for the configuration to cover the entire lawn with water without exceeding the operating pressure.