TL;DR
A test tee is a drainage fitting with a threaded, plugged side opening installed in a DWV stack or building drain so the system can be plugged and filled with water or air for its required pressure test. During rough-in inspection the plumber inserts an inflatable test ball or screws in a plug below the fitting, fills the stack with a ten-foot head of water, and the inspector verifies no level drop.
What it means
A test tee is a drainage fitting with a threaded, plugged side opening installed in a DWV stack or building drain so the system can be plugged and filled with water or air for its required pressure test. During rough-in inspection the plumber inserts an inflatable test ball or screws in a plug below the fitting, fills the stack with a ten-foot head of water, and the inspector verifies no level drop. Afterward the opening doubles as a cleanout access point.
Where it sits in the glossary
Test tee 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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