Determine where sump pump discharge may legally go (and confirm it can't go to the sanitary sewer)

Steps

1. Sump/foundation-drain discharge to the sanitary sewer is prohibited or restricted in most U.S. jurisdictions, but this is set by local sewer-use ordinance, not one uniform national plumbing-code section — confirm the actual rule with the local water/sewer utility or building department before designing a discharge point.
2. Treat these as two separate code questions: the IPC's sanitary-drainage/sump provisions govern how an interior sump ties into the building's own gravity drainage system, while whether ground/clear water may enter the public sanitary sewer at all is regulated separately, usually by a local sewer-use or stormwater ordinance.
3. Typical allowed discharge points named in local ordinances include a storm sewer connection (if available and permitted), a dry well/infiltration system, daylighting to grade at a safe distance/slope from the foundation, or a rain garden/detention feature — confirm which options the specific jurisdiction allows, since this varies by municipality.
4. Confirm whether the discharge point itself needs a separate grading/stormwater/erosion permit — directing water onto neighboring property or the right-of-way without approval is its own violation even where sanitary discharge is properly avoided.
5. In combined-sewer cities, check for an active mandatory disconnection/retrofit program — some legacy sump-to-combined-sewer connections predate the current ban and are not automatically grandfathered.