How do I calculate the number of sprinkler heads per zone?
Calculating Zones Each zone should include plants with the same watering needs, or an area of the lawn. Then, add up the necessary flow rate in GPM of all the sprinkler heads, divided by the GPM of your water supply. The resulting number will equal how many zones you need.
How many gallons per minute does a Rainbird sprinkler use?
However, the flow rate of the Rain Bird PRS spray held steady at 2.1 gallons per minute, saving almost a gallon per minute over the non-PRS spray.
How much water does a Rain Bird sprinkler put out?
Many nozzles have the gpm figure stamped or molded right on them. Generally, spray heads use about 0.75 gpm for ¼-circle, 1.5 gpm for ½ circle, and 3.0 gpm for full-circle heads. “Rotor” style heads use 2 to 5 gpm each, for most residential applications.
How do you calculate gallons per minute?
The formula to find GPM is 60 divided by the seconds it takes to fill a one gallon container (60 / seconds = GPM). Example: The one gallon container fills in 5 seconds. 60 / 5 = 12 GPM. (60 divided by 5 equals 12 gallons per minute.)
How many gallons of water does a sprinkler system use per hour?
1,020 gallons
Watering with a typical sprinkler using a standard 5/8″ garden hose for one hour uses about 1,020 gallons of water; if you water three times per week, that’s about 12,240 gallons per month.
How much pressure do pop up sprinklers need?
We’re Talking PSI The optimum operating pressure for most residential sprinkler heads is between 30 and 50 pounds per square inch (PSI). With correct water pressure, each head will perform the way they were designed, and the result will be even spray-patterns and efficient use of water.
What do you need to know about Rain Bird irrigation?
For a more technical overview related to system design and hydraulics, you can review Rain Bird’s Landscape Irrigation Design Manual. Screw a pressure gauge onto the nearest faucet to the water meter. Make sure no water is running anywhere inside or outside your house. Turn on the faucet with the gauge attached.
How to calculate the precipitation rate of a sprinkler system?
When four sprinklers delivering 1.1 gpm (0,25 m3/h) each are added together, they are the equivalent of one full circle sprinkler or 4.4 gpm (1 m3/h). With full circle sprinklers, you can use the equivalent of one sprinkler’s discharge as the gallons per minute (meters cubed per hour) for the precipitation rate formula.
How is triangular spacing used for precipitation rate?
Triangular spacing is just as easy to work with when calculating the precipitation rate as square or rectangular spacing. The main difference is calculating the height of the pattern before using it as one of the dimensions in the formula. In this example, large size rotors are spaced head-to-head at 70 ft (21 m) in a triangular pattern.