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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.

## 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.

#### Total Pipe Length

Where:

= Total Pipe Length (ft)

= Number of sprinklers per line

= Distance between sprinklers, sprinkler spacing (ft)

#### Total Flow Rate

Where:

= Total Flow Rate (gpm)

= Sprinkler flow rate (gpm)

= Number of sprinklers per line

#### Lateral Friction Loss

Where:

= Friction Loss (psi)

= Total Flow Rate (gpm)

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

= Pipe Size (in)

= Total Pipe Length (ft)

= Number of sprinklers per line

Reference: Washington State University