Tap Size vs. Turf Area Table#
This table is intended as an aid for irrigation design. The values are calculated assuming peak daily evapotranspiration rates of 0.25 inches for Kentucky Bluegrass and 0.20 inches for Turf-type Tall Fescue. For the purposes of the calculations, assume that the irrigation efficiency and tap utilization efficiency are equal to 100 percent, and the maximum time of irrigation is 8 hours. More realistically, however, this would be equivalent to irrigation and tap utilization efficiencies of 80 percent, and a maximum irrigation time of 12 hours.
These maximum discharges assume a disk-type meter. In certain cases irrigation-only taps that are 1-1/2 inches or larger, turbine meters are allowed, which have higher maximum discharge limits.
|
Tap Size |
Maximum Discharge (gpm) |
Maximum Bluegrass Area |
Maximum Tall Fescue Area |
||
|---|---|---|---|---|---|
| sq.ft. | acres | sq.ft. | acres | ||
| 3/4" | 10 | 30,800 | 0.71 | 38,500 | 0.88 |
| 1" | 25 | 77,000 | 1.77 | 96,000 | 2.20 |
| 1 1/2" | 50 | 154,000 | 3.54 | 192,500 | 4.42 |
| 2" | 80 | 246,500 | 5.66 | 308,000 | 7.07 |
| 3" | 160 | 493,000 | 11.32 | 616,000 | 14.14 |
Did You Know?
Sprinkler systems can be designed, installed and operated with water-efficiency in mind.
We clean and maintain the City's wastewater system year-round to prevent sewer backups. You can help by only flushing the three Ps.
You can save water when washing fruits or vegetables by filling the sink with water instead of running the faucet.