WATER SUPPLY, PLUMBING, ETC., FOR COUNTRY HOMES. 23 



To find the approximate discharge at each stroke of a pump in 

 gallons use the following table: 



Table of capacity of j)umps. 



Diameter 









Leng 



th of stroke in inches. 





























of cyl- 

 inder in 



5 



6 



7 



8 



9 



10 



12 



14 



15 



16 



























Capacity per stroke in gallons. 



1 



0.01? 



0.020 



0.024 



0.027 



0.031 



0.034 



0.041 



0.048 



0.051 



0.054 



^ 



.022 



.026 



.030 



.034 



.039 



.043 



.052 



.060 



.065 



.069 



li 



.027 



.032 



.037 



.043 



.048 



.053 



.064 



.074 



.079 



.085 



If 



.032 



.039 



.044 



.051 



.058 



.064 



.077 



.089 



.096 



.103 



n 



.038 



.046 



.054 



.061 



.069 



.077 



.092 



.107 



.115 



.122 



ll 



.052 



.063 



.073 



.083 



.094 



.104 



.125 



.146 



.156 



.170 



2 



.068 



.082 



.095 



.109 



.122 



.136 



.163 



.190 



.204 



.218 



2| 



.086 



.103 



.121 



.138 



.155 



.172 



.206 



.241 



.258 



.275 



2J 



.106 



.128 



.149 



.170 



.191 



.213 



.255 



.298 



.319 



.340 



2f 



.129 



.154 



.180 



.206 



.231 



.257 



.309 



.360 



.386 



.411 



3 



.153 



.184 



.214 



.245 



.275 



.306 



.367 



.428 



.459 



.489 



3i 



.179 



.215 



.251 



.287 



.323 



.359 



.431 



.503 



.539 



.575 



3i 



.208 



.249 



.292 



.333 



.375 



.417 



.499 



.583 



.625 



.666 



3f 



.239 



.287 



.335 



.382 



.430 



.478 



.574 



.669 



.717 



.765 



4 



.272 



.326 



.381 



.435 



.490 



.544 



.653 



.762 



.816 



.870 



4i 



.307 



.368 



.429 



.491 



.553 



.614 



.737 



.860 



.921 



.982 



4i 



.344 



.413 



.482 



.551 



.619 



.689 



.826 



.964 



1.033 



1.102 



ii 



.384 



.460 



.537 



.614 



.690 



.767 



.920 



1.073 



1.150 



1.227 



5 



.425 



.510 



.595 



.680 



.765 



.850 



1.020 



1.190 



1.275 



1.360 



5i 



.469 



.562 



.656 



.750 



.843 



.937 



1.124 



1.311 



1.405 



1.499 



5J 



.514 



.617 



.720 



.823 



.926 



1.029 



1.234 



1.440 



1.543 



1.646 



51 



.562 



.674 



.787 



.899 



1.011 



1.124 



1.348 



1.573 



1.686 



1.798 



6 



.612 



.734 



.857 



.979 



1.102 



1.224 



1.469 



1.714 



1.836 



1.958 



The discharge per stroke as shown by the above table may be 

 multiplied by the number of strokes per minute to find the discharge 

 in gallons per minute. 



The power required for pumping will depend on the number of 

 gallons per minute one wishes to pump and the total lift. 



The total lift is the vertical distance from the surface of the water 

 in the well to the highest faucet or to the storage tank plus the 

 friction loss in the pipes. If the length of distribution pipe is over 

 100 feet the loss by frictional resistance in feet of lift should be 

 determined and included in the total lift. The following table gives 

 the frictional loss in feet of lift per 100 feet in pipes from f to 4 inches 

 in diameter, discharging from 5 to 40 gallons per minute. 



Fractional loss in feet for 100 feet clean iron pipes} 



Gallons 



per 

 minvite. 



finch. 



1 inch. 



li 

 inches. 



inches. 



2 

 inches. 



2J 

 inches. 



3 

 inches. 



3i 

 inches. 



4 

 inches. 



5 



10 

 15 



7.6 

 29.9 

 66.0 



1.9 

 7.3 

 16.1 



0.71 



1.4 



5.5 



0.27 

 1.0 

 2.2 



0.09 



.28 

 .57 



0.05 

 .09 

 .18 



0.01 

 .05 

 .09 







0.01 

 .05 





0.02 



20 



115.0 



28.0 



9.5 



4.8 



.96 



.32 



.13 



.07 



.03 



25 



179.0 



43.7 



14.7 



6.0 



1.7 



.48 



.23 



,09 



.05 



30 



264.0 



63.2 



21.0 



8.6 



2.1 



.69 



.30 



.14 



.07 



35 



372.0 



85.1 



28.9 



11.6 



2.7 



.92 



.39 



.20 



.11 



40 



461.0 



110.0 



37.0. 



14.9 



3.7 



1.2 



.53 



.25 



.14 



1 Ellis and Howland's experiments. 



