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Lateral Friction Loss

This is for a sprinkler lateral with sprinklers on a regular interval and is plugged at the end.

Learn more about the units used on this page.

Lateral Friction Loss

Sprinklers Per Line:
Sprinkler Spacing:
Sprinkler Flow Rate:
Pipe Size:
Pipe Type:
Total Flow Rate:
Total Pipe Length:
Friction Loss:

The Equation

This calculator uses this formula to determine the Total Flow Rate, Total Pipe Length, and Friction Loss.

Lateral Friction Loss Model

Lateral Friction Loss

Total Pipe Length


Total pipe length

Where:

Length= Total Pipe Length (ft)

Number of sprinklers= Number of sprinklers per line

Distance= Distance between sprinklers, sprinkler spacing (ft)

 

Total Flow Rate


Total Flow Rate

Where:

Total flow rate symbol= Total Flow Rate (gpm)

sprinkler flow rate= Sprinkler flow rate (gpm)

number of sprinklers= Number of sprinklers per line

 

Lateral Friction Loss


Lateral friction loss equation

Where:

Friction loss symbol= Friction Loss (psi)

Total flow rate symbol= Total Flow Rate (gpm)

Pipe type value= An arbitraty number to account for the pipe type (Plastic: 150, Aluminum: 120)

Pipe Size Symbol= Pipe Size (in)

total pipe length symbol= Total Pipe Length (ft)

Number of sprinklers symbol= Number of sprinklers per line

Reference: Washington State University

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