TL;DR
An indirect waste line is the discharge pipe that carries wastewater from a protected appliance to its receptor while terminating above it with a visible air gap or air break, keeping the appliance physically separated from the sewer. Codes limit its developed length before a trap is required, commonly anything over 30 inches needs trapping under the IPC, and it must be sized, sloped, and accessible for cleaning since slime accumulates in lines from ice makers and condensate-producing equipment.
What it means
An indirect waste line is the discharge pipe that carries wastewater from a protected appliance to its receptor while terminating above it with a visible air gap or air break, keeping the appliance physically separated from the sewer. Codes limit its developed length before a trap is required, commonly anything over 30 inches needs trapping under the IPC, and it must be sized, sloped, and accessible for cleaning since slime accumulates in lines from ice makers and condensate-producing equipment. In kitchens it usually lands in a floor sink with a strainer.
Where it sits in the glossary
Indirect waste line is part of the Trade jargon group inside the ProFix Directory glossary. Browse every term in this category from the glossary index.
Why Ohio homeowners should know it
This is a term Ohio homeowners encounter when reading contractor quotes, hiring paperwork, or inspection reports. Understanding it well enough to ask one good follow-up question is usually all the protection a homeowner needs.
ProFix Directory keeps definitions short on the index page and saves the longer context — Ohio-specific rules, where the term comes from, and which ProFix tools touch it — for these per-term pages so the term is easy to cite and easy to share.
ProFix tools that touch this term
See also
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