Hazen-Williams Table Lookup
For Steel Pipe (C = 120)
\[ \text{Pressure Drop (psi/ft)} = \frac{4.52 \cdot Q^{1.85}}{C^{1.85} \cdot d^{4.87}} \]
Flow Rate (Q) in gpm:
Nominal Pipe Size (SCH40):
1"
1 1/4"
1 1/2"
2"
2 1/2"
3"
4"
5"
6"
8"
10"
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