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Pressure Loss from Laterals with Outlets

This first form calculates friction loss in a pipe with equally spaced outlets, such as a sprinkler lateral or a manifold.

Learn more about the units used on this page.

Friction Loss from Laterals or Manifolds with Outlets

Flow Rate In The Pipe:
Pipe Inside Diameter:
Number of Outlets:
Pipe Length:
Pipe Material:
Pressure Loss:

Minimum Pipe Diameter Size

This second form calculates the minimum pipe size for a pipe with equally spaced outlets such as a sprinkler lateral or manifold given a maximum allowable pressure loss.

Flow Rate In The Pipe:
Maximum Allowable Pressure Loss:
Number of Outlets:
Pipe Length:
Pipe Material:
Minimum Pipe Diameter:

Reference: Washington State University