Trap-Seal Protection Check
Within-limit pass/fail and percent of the permitted trap-to-vent distance used, with a self-/induced-siphonage flag when the vent is inadequate. Per IPC §1002 / UPC §1002; the permitted maximum is user-supplied from the adopted table.
Formula and source
Pass if the developed trap-to-vent distance <= the code-permitted maximum for the drain diameter; percent used = distance / permitted x 100; siphonage risk when the vent is inadequate or the trap seal is below 1 in.
IPC §1002 / UPC §1002 trap-seal-protection and trap-to-vent distance provisions, by name.
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