Plumbing Rules. Part 3
Description
This section is from the book "Questions And Answers On The Practice And Theory Of Sanitary Plumbing", by R. M. Starbuck. Also available from Amazon: Questions and Answers on the Practice and Theory of Sanitary Plumbing.
Plumbing Rules. Part 3
Capacity Of Drain Pipe Under Different Amounts Of Fall
GALLONS PER MINUTE. | ||||||||
Size of Pipe. | 1/2 in. fall per 100 ft. | 3 in. fall per 100 ft. | 6 in. fall per 100 ft. | 9 in. fall per 100 ft. | 12 in. fall per 100 ft. | 18 in. fall per 100 ft. | 24 in. fall per 100 ft. | 36 in. fall per 100 ft. |
3 in. | 21 | 30 | 42 | 52 | 60 | 74 | 85 | 104 |
4 " | 36 | .52 | 76 | 92 | 108 | 132 | 148 | 184 |
6 " | 84 | 120 | 169 | 206 | 240 | 294 | 338 | 414 |
9 " | 232 | 330 | 470 | 570 | 660 | 810 | 930 | 1140 |
12 " | 470 | 680 | 960 | 1160 | 1360 | 1670 | 1920 | 2350 |
15 " | 830 | 1180 | 1680 | 2040 | 2370 | 2920 | 3340 | 4I00 |
18 " | 1300 | 1850 | 2630 | 3200 | 3740 | 4600 | 5270 | 6470 |
20 " | 1760 | 2450 | 3450 | 4180 | 4800 | 5980 | .6850 | 8410 |
Table Of Quantity Of Water Delivered By Service Pipes Of Various Sizes Under Various Pressures
Proportion of Head of Water (H) to Length of Pipe (L).
Results in Gallons Per Minute. | ||||||||
Diameter of Pipe. | H=I0 L. | H=9 L. | H = 8 L. | H = 7 L. | H=6 L. | H = 5 L. | H=4 L. | H = 3 L. . |
1/2 | I9.8 | 18.7 | 17.7 | 16.5 | 15.3 | 14.0 | 12.5 | I0.8 |
5/8 | 34.5 | 32.78 | 30.1 | 28.9 | 26.5 | 24.4 | 21.5 | 18.9 |
3/4 | 54.4 | 51.7 | 48.7 | 45.6 | 42.2 | 38.5 | 34.4 | 29.8 |
1 | 111.8 | 106.0 | 100.0 | 93.5 | 86.6 | 79.0 | 70.7 | 61.2 |
1 1/4 | 195.2 | 185.2 | 174.6 | 163.3 | 151.2 | 138.0 | 123.4 | 106.9 |
1 1/2 | 308.0 | 292.I | 275.4 | 257.6 | 238.5 | 217.7 | 194.8 | 168.7 |
2 | 632.2 | 599.7 | 566.4 | 538.9 | 488.1 | 447.0 | 399.8 | 346.3 |
2 1/2 | 1104.0 | I048.0 | 987.8 | 924.0 | 855.4 | 780.9 | 698.5 | 604.9 |
3 | 1745.0 | 165I.0 | I560.0 | 1460.0 | 1351.0 | 1234.0 | 103.0 | 955.5 |
4 | 3581.0 | 3397.0 | 3203.0 | 2996.0 | 2774.0 | 2532.0 | 2265.0 | 1962.0 |
5 | 6247.0 | 5928.0 | 5588.0 | 5227.0 | 4839.0 | 4417.0 | 3951.0 | 3406.0 |
6 | 9855.0 | 9349.0 | 8814.0 | 8245.0 | 7633.0 | 6968.0 | 6233.0 | 5391.0 |
Diameter of Pipe. | H = 2 L. | H = 1 3/4 L. | H = 1 1/2 L. | H = 1 1/4 L. | H=L. | H= 3/4 L. | H = 1/2 L. | H = 1/4 L. |
Inches. 1/2 | 8.8 | 8.3 | 7.7 | 7.0 | 6.3 | 5.4 | 4.4 | 3.1 |
5/8 | 15.4 | I4.4 | 13.4 | 12.2 | 10.9 | 915 | 7.7 | 5.5 |
3/4 | 24.3 | 22.8 | 21.1 | 19.3 | 17.2 | I4.9 | 12.2 | 8.6 |
I | 50.0 | 46.8 | 43.2 | 39.5 | 35.3 | 30.6 | 25.0 | 17.7 |
1 1/4 | 87.3 | 81.6 | 75.6 | 69.0 | 61.7 | 53.5 | 43.7 | 30.9 |
1 1/2 | 137.7 | 128.8 | 119.3 | 108.9 | 97.4 | 84.3 | 68.7 | 48.7 |
2 | 282.7 | 264.4 | 248.8 | 223.5 | 199.9 | 173.1 | 141.4 | 100.0 |
2 1/2 | 493.9 | 482.0 | 427.7 | 390.4 | 349.2 | 302.4 | 246.9 | 174.6 |
3 | 780.2 | 728.8 | 674.8 | 615.9 | 555.5 | 477.1 | 390.1 | 275.8 |
4 | 1602.0 | I496.0 | 1385.0 | 1264.0 | 1133.0 | 979.3 | 800.8 | 566.2 |
5 | 2791.0 | 2613.0 | 2420.0 | 2209.0 | 1976 0 | 1711.0 | 1394.0 | 987.7 |
6 | 4407.0 | 4122.0 | 3817.0 | 3484.0 | 3116.0 | 2693.0 | 2204.0 | 1558.0 |
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