SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/home-yard-water-heater-relief-check

Which water heater part lets water or steam escape if the tank gets too hot or the pressure too high?

The temperature-pressure relief valve, often called the T&P valve.

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  1. The drain valve
  2. The temperature-pressure relief valve ✔
  3. The cold-water shutoff

Why: The temperature and pressure (T&P) relief valve is the tank's safety release. Every water heater must have a working one. If it drips or leaks, call a licensed plumber.

Huh, didn't know that: T&P valves open when pressure reaches 150 psi or the water reaches 210 degrees Fahrenheit.

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References

Answer: The temperature-pressure relief valve. The temperature and pressure (T&P) relief valve is the tank's safety release. Every water heater must have a working one. If it drips or leaks, call a licensed plumber.

  1. T&P Drain Valves, San Diego County Housing and Community Development www.sandiegocounty.gov/content/sdc/sdhcd/rental-assistance/current-participants/inspections/tp-drain-valves.html
    allows water or steam to escape from the water heater if the water temperature is too hot or the pressure is too high.
    Checked 2026-10-11.

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