TL;DR
A temperature and pressure relief valve is the combination safety device every storage water heater must carry, sensing both overheat and overpressure with a thermostatic probe extending into the top six inches of tank water. Plumbing codes require it to be listed to ANSI Z21.22 and piped to a safe discharge point with no valves, traps, or upward runs in between.
What it means
A temperature and pressure relief valve is the combination safety device every storage water heater must carry, sensing both overheat and overpressure with a thermostatic probe extending into the top six inches of tank water. Plumbing codes require it to be listed to ANSI Z21.22 and piped to a safe discharge point with no valves, traps, or upward runs in between. Lifting the test lever annually confirms the seat still moves; one that dribbles constantly usually points to system pressure problems rather than a bad valve.
Where it sits in the glossary
Temperature and pressure relief valve 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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