Rain Bird lawn spray heads usually emit over 1 inch per hour.
Rain Bird High Performance Sprinklers are built rugged to withstand the harsh conditions in agricultural applications. With flow rates ranging from 0.28 to 6.82 gpm (62 to 1,549 l/h), these sprinklers deliver precise, uniform and unrivaled water distribution.
For conventional sprayheads, precipitation rates typically range from 1.3 inches to 2 inches per hour. For gear drive rotors, precipitation rates typically range from 0.4 inch to 1 inch per hour. For rotary nozzles, precipitation rates typically range from 0.4 inch to 0.6 inch per hour.
Designed to fit on Rain Bird® spray heads, Rotary Nozzles provide unsurpassed design flexibility and highly efficient water distribution from13' to 24'. Low precipitation rate – 0.60 in/hr (15,2mm/hr) – reduces run-off and erosion. Multiple, rotating streams uniformly distribute water throughout the radius range.
Fixed spray heads apply 1.5 to 2 inches of water per hour in a fan-shaped spray. Rotors apply about 0.5 inches of water per hour in a single, rotating stream of water. Rotary nozzles apply approximately 0.4-0.6 inches per hour in multiple, rotating streams of water.
To determine how long you need to water to get one inch, place a plastic container in your yard and set a timer. On average, it will take 30 minutes to get a half inch of water. So, 20 minutes, three times per week will give a lawn about an inch of water. This formula works best with healthy, well-cultivated soil.
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.
The answer is that it usually takes up to 30 minutes to get a half inch of water. Watering 3 times per week equals to an inch of water on a lawn. Plants can be watered 1 to 2 times a week in seasons where there is a higher chance of rainfall and less evaporation.
The average system uses approximately 15-16 gallons per minute, per station.
Nothing should be in that area between the bottom of the sprinkler heads and the imaginary horizontal plane parallel to the ceiling that is 18 inches below. This is done to allow an even and unobstructed spray pattern from the sprinklers when triggered to extinguish the fire.
Sprinklers generally cover up wider ground and spread out water at a slow yet steady pace, which makes all the soil moisturized evenly and soaked underground. A watering hose takes time to cover space and can clutter the soil if there's too much water.
The average usage of water in a residential sprinkler system is between 12 – 30 gallons per minute depending on the type and size of the sprinkler head.
For example, at 35 pounds per square inch (PSI) the 5000 Series Rotor using the 3.0 nozzle will use 3.11 gallons per minute (GPM).
Rain Bird's High Flow Inline Pressure Regulator family provides a wide flow range coverage (0.5-70 gpm) while delivering reliable pre-set regulation to protect and maximize the performance of most irrigation installations. Available in 40 and 50 psi versions.
A watering session should be long enough to soak the area sufficiently so all the roots receive a beneficial drink. Sprinklers should be set to run for about 30 to 35 minutes at a time twice a week. Your goal is at least 1″ of water a week for your lawn.
If your sprinkler output is 1½ inches per week, your sprinklers should run for only ⅓ hour or 20 minutes that week (½ divided by 1½). On a twice-weekly watering schedule, run your sprinklers 10 minutes each time.
Rainbird 1800 Pop-Up Spray Head Sprinkler, 2.6 - 3.7 gpm, 1/2 in FNPT, 2 in Pop Up.
Using Direct Measurement of Sprinkler Discharge Rate
Keep track of the time it takes to collect a known volume of water. Then, calculate the sprinkler discharge rate (gallons per minute). Example: If it takes 100 seconds to collect 2 gallons of water from a sprinkler head, the discharge rate is 1.2 gpms.
The weight of 1 U.S. gallon of pure water is about 8.345 pounds. Consequently, a rainfall of 1 inch over 1acre of ground would mean 27,143 gallons of water.
Light applications of water promote lush growth but shallow grass roots. Shallow-rooted turf grass undergo more stress in dry conditions. So, how much is an inch of water a week? Experts say this amounts to roughly six gallons per square yard per week.
One inch of water or rain is equivalent to 623 gallons per 1,000 square feet.
Instead, you can water for 30 minutes twice a week. But some experts advise against extending irrigation sessions beyond that (for example, watering for 20 minutes three different times a week). Watering too frequently keeps roots too close to the surface.