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2021 National Standard Plumbing Code
Add up the total number of water supply fixture units (wsfu) required in the facility.
Estimate demand using the table from the IPC that correlates wsfu to expected demand.
Size the pipe using demand vs. friction loss curves found in the IPC charts. Pipe sizes-Click to enlargeClick Link to View:
Reference section
Asheville Plumbing Tips & Articles Four Seasons Plumbing
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