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A plumbing engineer is designing a water supply system for a large apartment complex. The design must account for the peak demand during occupied hours. What concept is used to estimate the maximum probable flow rate for the entire building based on the collective fixture unit values?

Hunter's curve, often referred to as the fixture unit method, is the standard approach used in plumbing design to estimate the maximum probable flow rate for a

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Question: A plumbing engineer is designing a water supply system for a large apartment complex. The design must account for the peak demand during occupied hours. What concept is used to estimate the maximum probable flow rate for the entire building based on the collective fixture unit values?

Answer options:

  • Hazen-Williams equation
  • Darcy-Weisbach equation ✅ Hunter's curve (fixture unit method)
  • Bernoulli's principle

Correct answer: Hunter's curve (fixture unit method)

Explanation: Hunter's curve, often referred to as the fixture unit method, is the standard approach used in plumbing design to estimate the maximum probable flow rate for a building based on the total fixture unit count. It statistically accounts for the fact that not all fixtures will be used simultaneously.

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