Gallon per minute (GPM) is a crucial unit in measuring flow rate, especially in the context of plumbing, irrigation, and various industrial applications. Originally rooted in the British Imperial system, the gallon has a rich history with variations across countries—such as the US liquid gallon, which is approximately 3.785 liters, and the UK gallon, which is around 4.546 liters. This means that when considering flow rates, the distinction between these gallons can lead to significant differences in calculation and application.
What’s particularly fascinating about GPM is its pivotal role in modern sustainability efforts. For example, showerheads in the United States are often rated by their GPM to help reduce water usage and promote conservation. Low-flow fixtures, which typically limit water flow to 2.5 GPM or less, have become a standard in reducing both water waste and energy costs, highlighting the intersection of environmental responsibility and engineering.
The pint per second unit may not seem familiar to some, but it’s a fascinating measure of flow rate, primarily used to quantify liquid flow in a system. Originating from the British Imperial system, a pint per second represents the volume of one pint flowing through a conduit every second. While we often think about flow rates in terms of liters per second or gallons per hour, pint per second can be a useful measure for smaller-scale applications, especially in culinary or laboratory settings.
Interestingly, the concept of flow rate is crucial in various industries, from chemical processing to beverage dispensing. Consider beer taps at a busy pub; they might be designed to achieve an optimal flow rate, ensuring a pint of beer is expertly poured in a matter of seconds, balancing speed and quality to create the perfect pour.
Gallons per minute | Pints per second |
---|---|
0
gal/min
|
0
pnt/s
|
10
gal/min
|
1.33333
pnt/s
|
20
gal/min
|
2.66667
pnt/s
|
30
gal/min
|
4
pnt/s
|
40
gal/min
|
5.33333
pnt/s
|
50
gal/min
|
6.66667
pnt/s
|
60
gal/min
|
8
pnt/s
|
70
gal/min
|
9.33333
pnt/s
|
80
gal/min
|
10.66667
pnt/s
|
90
gal/min
|
12
pnt/s
|
100
gal/min
|
13.33333
pnt/s
|
110
gal/min
|
14.66667
pnt/s
|
120
gal/min
|
16
pnt/s
|
130
gal/min
|
17.33333
pnt/s
|
140
gal/min
|
18.66667
pnt/s
|
150
gal/min
|
20
pnt/s
|
160
gal/min
|
21.33333
pnt/s
|
170
gal/min
|
22.66667
pnt/s
|
180
gal/min
|
24
pnt/s
|
190
gal/min
|
25.33333
pnt/s
|
200
gal/min
|
26.66667
pnt/s
|
210
gal/min
|
28
pnt/s
|
220
gal/min
|
29.33333
pnt/s
|
230
gal/min
|
30.66667
pnt/s
|
240
gal/min
|
32
pnt/s
|
250
gal/min
|
33.33333
pnt/s
|
260
gal/min
|
34.66667
pnt/s
|
270
gal/min
|
36
pnt/s
|
280
gal/min
|
37.33333
pnt/s
|
290
gal/min
|
38.66667
pnt/s
|
300
gal/min
|
40
pnt/s
|
310
gal/min
|
41.33333
pnt/s
|
320
gal/min
|
42.66667
pnt/s
|
330
gal/min
|
44
pnt/s
|
340
gal/min
|
45.33333
pnt/s
|
350
gal/min
|
46.66667
pnt/s
|
360
gal/min
|
48
pnt/s
|
370
gal/min
|
49.33333
pnt/s
|
380
gal/min
|
50.66667
pnt/s
|
390
gal/min
|
52
pnt/s
|
400
gal/min
|
53.33333
pnt/s
|
410
gal/min
|
54.66667
pnt/s
|
420
gal/min
|
56
pnt/s
|
430
gal/min
|
57.33333
pnt/s
|
440
gal/min
|
58.66667
pnt/s
|
450
gal/min
|
60
pnt/s
|
460
gal/min
|
61.33333
pnt/s
|
470
gal/min
|
62.66667
pnt/s
|
480
gal/min
|
64
pnt/s
|
490
gal/min
|
65.33333
pnt/s
|
500
gal/min
|
66.66667
pnt/s
|
510
gal/min
|
68
pnt/s
|
520
gal/min
|
69.33333
pnt/s
|
530
gal/min
|
70.66667
pnt/s
|
540
gal/min
|
72
pnt/s
|
550
gal/min
|
73.33333
pnt/s
|
560
gal/min
|
74.66667
pnt/s
|
570
gal/min
|
76
pnt/s
|
580
gal/min
|
77.33333
pnt/s
|
590
gal/min
|
78.66667
pnt/s
|
600
gal/min
|
80
pnt/s
|
610
gal/min
|
81.33333
pnt/s
|
620
gal/min
|
82.66667
pnt/s
|
630
gal/min
|
84
pnt/s
|
640
gal/min
|
85.33333
pnt/s
|
650
gal/min
|
86.66667
pnt/s
|
660
gal/min
|
88
pnt/s
|
670
gal/min
|
89.33333
pnt/s
|
680
gal/min
|
90.66667
pnt/s
|
690
gal/min
|
92
pnt/s
|
700
gal/min
|
93.33333
pnt/s
|
710
gal/min
|
94.66667
pnt/s
|
720
gal/min
|
96
pnt/s
|
730
gal/min
|
97.33333
pnt/s
|
740
gal/min
|
98.66667
pnt/s
|
750
gal/min
|
100
pnt/s
|
760
gal/min
|
101.33333
pnt/s
|
770
gal/min
|
102.66667
pnt/s
|
780
gal/min
|
104
pnt/s
|
790
gal/min
|
105.33333
pnt/s
|
800
gal/min
|
106.66667
pnt/s
|
810
gal/min
|
108
pnt/s
|
820
gal/min
|
109.33333
pnt/s
|
830
gal/min
|
110.66667
pnt/s
|
840
gal/min
|
112
pnt/s
|
850
gal/min
|
113.33333
pnt/s
|
860
gal/min
|
114.66667
pnt/s
|
870
gal/min
|
116
pnt/s
|
880
gal/min
|
117.33333
pnt/s
|
890
gal/min
|
118.66667
pnt/s
|
900
gal/min
|
120
pnt/s
|
910
gal/min
|
121.33333
pnt/s
|
920
gal/min
|
122.66667
pnt/s
|
930
gal/min
|
124
pnt/s
|
940
gal/min
|
125.33333
pnt/s
|
950
gal/min
|
126.66667
pnt/s
|
960
gal/min
|
128
pnt/s
|
970
gal/min
|
129.33333
pnt/s
|
980
gal/min
|
130.66667
pnt/s
|
990
gal/min
|
132
pnt/s
|
1000
gal/min
|
133.33333
pnt/s
|
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