About Calculating the Sizes of Supply Plumbing Lines

Before you size a supply plumbing system, you should:

• Complete a draft of the system.
• Verify the accuracy of the fixture unit table you are using. For more information, see Specifying Fixture Unit Tables.
• Create a sizing table for supply plumbing lines based on applicable codes, such as the Uniform Plumbing Code, or verify the accuracy of the table you are using. For more information, see Specifying Pipe Sizing Tables.

Note: You can only size supply plumbing systems whose system type is Hot Water or Cold Water.