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Plastic Pipe Sizing Chart

Pipe Length

Diameter 100' 200' 350' 500' 750' 1000' 1500' 2000' 3500' 1 mile
1/2" 4* 3 -- 2 -- -- 1 -- -- --
3/4" 8 8 6 5 4 3 -- 2 -- 1
1" 13 13 10 8 7 6 5 4 3 2
1-1/4" 23 23 21 19 15 12 9 8 6 4
1-1/2" 30 30 30 26 22 19 15 12 9 7
2" 50 50 50 50 43 37 29 25 18 15

trench* Flow rate in gallons per minute
Source: Kentucky Grazers Supply

Plastic Pipe Friction Loss

  3/4" 1" 1-1/4" 1-1/2"
8 gpm 5.8 psi 1.3 psi .4 psi .2 psi
10 gpm 8.4 psi 2.7 psi .7 psi .3 psi

Source: Great Lakes Basin Grazing Network
& Michigan State University Extension

 

 

For more forage information contact Dr. Keith Johnson: johnsonk@purdue.edu

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