You need to know the linear density.
Multiply gpm by the number of minutes the flow lasted, to find the gallons of volume that flowed during that time.
8 GPM
3gpm
0.1gpm/sq-ft
0.10 gpm over 3000 square foot area.
almost 400 GPM
$3.15 per/hour I just did calculation based on: -- City water price of 0.015 cents per gallon of water (water & sewer) -- A GPM rating of 3.5 gallons per minute on the single sprinkler --TOTAL it costs me $3.15 per hour to run a single standard hose-type sprinkler **note: there is a large variation of in garden sprinklers. Some have GPM of 0.5 all the way up to 8. Average sprinklers run 3-4 GPM. I split the difference of the average.
52 gpm
Fire sprinklers are rated by gpm per square foot, plus the temperature at which they are triggered, plus the diameter of the spray (angle of the cone), among other things.
You need to know the linear density.
Ordinary Hazard Group 1 density is 0.15 gpm/sq ft over 1500 sq ft if wet pipe system Ordinary Hazard Group II density is 0.20 gpm/sq ft over 1500 sq ft if wet pipe system (according to NFPA 13) There are factors that can change the density and area requirements depending on variou sfactors, but in general the above densities/area are correct.
There are many variables. The sprinkler heads come in different sizes. Rate of flow will be determined by the head-size, the frictional losses in the supply pipework, and the head of water available. In a single building example, sprinkler heads of exactly the same type, and fed by exactly the same bore pipework, on three different floors will give three different flow rates. Simple answer? "It varies"
150
The easiest way would be to capture the sprinkler water and fill a 5gallon bucket and time your self. When the buckets full then divide the time it took by 5 and you have your GPM.
The EPA limits gas station pumps to no more than 10 gpm. The average gas station pump is between 5 and 10 gpm.
Extra hazard occupancies require densities of either 0.30 gpm/sq ft or 0.40 gpm/sq ft, for which the maximum head layout is 100 sq ft per NFPA 13. There are some sprinkler heads in the market that allow coverages up to 196 sq ft with a special listing. Tyco EC-25 and EC-17, and Reliable MBEC-14 are some of the heads that can be used with certain restrictions.