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Plumber Red Seal · Question

In the context of the National Plumbing Code, what does the term 'developed length' refer to?

Developed length is a crucial measurement for sizing vents and drains, representing the total length of the pipe including the path it takes through all fitting

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Question: In the context of the National Plumbing Code, what does the term 'developed length' refer to?

Answer options:

  • The straight horizontal distance of a pipe.
  • The vertical elevation change between two points in a piping system. ✅ The length along the centre line of the pipe and fittings.
  • The total fixture unit load a pipe can serve.

Correct answer: The length along the centre line of the pipe and fittings.

Explanation: Developed length is a crucial measurement for sizing vents and drains, representing the total length of the pipe including the path it takes through all fittings, from its start to its end point.

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