6 - 8 FEET PER SECOND VELOCITY

Pipe Size

6-8 FPS GPM Range

PSI Pressure Loss/100'

1/8"

1 to 1.2

37 to 48

1/4"

2 to 2.8

30 to 56

3/8"

4 to 5

24 to 35

1/2"

6 to 8

16 to 26

3/4"

10 to 14

10 to 19

1"

15 to 24

6 to 14

1 - 1/4"

30 to 38

6 to 9

1 - 1/2"

40 to 61

4 to 7

2"

60 to 85

3 to 5.5

2 - 1/2"

90 to 115

2.5 to 4

3"

130 to 185

1.5 to 3.5

4"

230 to 310

1.3 to 2.4

6"

530 to 730

1 to 1.3

EQUIVALENT LOSSES

90' Elbow

20 Feet

45' Elbow

12 Feet

Branch Tee

15 Feet

Gate Valve (open)

15 Feet

Ball Valve (open)

25 Feet

Quick Disconnect (open)

35 Feet

Hose Barb

10 Feet

1 PSI = 2.31 Head Feet

1 HF = 0.432 PSI