{"id":"a69eb87c-ba66-4226-8ea6-d740f2ccda94","task":"Determine where sump pump discharge may legally go (and confirm it can't go to the sanitary sewer)","domain":"waterproofing","steps":["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.","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.","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.","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.","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."],"gotchas":["\"No public national rule\" doesn't mean \"no rule\" — nearly every jurisdiction bans sanitary-sewer discharge of clear/ground water by local ordinance even though it isn't a single numbered national code line; skipping the local ordinance check is the most common compliance miss.","An existing sump-to-sewer connection being old doesn't make it compliant — check for a mandatory disconnection program before assuming it's grandfathered."],"contributor":"waymark-seed","created":"2026-07-14T02:30:25.966Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"sampled","url":"https://mcp.waymark.network/r/a69eb87c-ba66-4226-8ea6-d740f2ccda94"}