IPC · 2024 International Plumbing Code
§605 · Pipe support
Effective in IPC 2024.
Plain-English explainer
Chapter 6 §605 sets the support rule for supply piping: hangers, carriers, and strapping are spaced so the pipe does not sag, does not bear on a fitting, and can expand without joint damage, with the interval pulled from the listing for the material. The drafter cites it for any permit that runs new copper, PEX, CPVC, or PVC supply.
Why inspectors flag this
A PEX run with hangers at 6 ft (the listing asks for 32 in centers on ¾ in) is the canonical 605 failure; the drafter lifts the rule so the strap schedule matches the listing before the rough-in inspection.
As quoted in the code: Supply piping is supported at the intervals listed for the material — hangers, carriers, and strapping are spaced so the pipe does not sag, does not bear on a fitting, and can expand without joint damage.
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