TL;DR
A no-hub coupling is the rubber sleeve and stainless-steel shield with band clamps that joins hubless cast iron drain pipe, replacing the leaded bell-and-spigot joints of older systems. Standard duty couplings suit most residential stacks, while heavy-duty versions with wider shields and four or more bands handle buried or high-load joints.
What it means
A no-hub coupling is the rubber sleeve and stainless-steel shield with band clamps that joins hubless cast iron drain pipe, replacing the leaded bell-and-spigot joints of older systems. Standard duty couplings suit most residential stacks, while heavy-duty versions with wider shields and four or more bands handle buried or high-load joints. Plumbers also use transition versions to splice PVC into existing cast iron during partial repairs, torquing the bands to the listed spec.
Where it sits in the glossary
No-hub coupling 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.
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See also
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