Lift and release water heater pressure relief valve

Short answer

Once a year, place a bucket under the discharge pipe, lift the T&P valve lever for a few seconds, and release; water should flow then stop completely.

Priority: High
Difficulty: DIY
Time: 10 min
How often: Once a year

Why It Matters

The T&P valve is the tank's emergency safety device. Mineral buildup can cement it shut, and a stuck valve risks tank rupture.

Tools

Bucket

How to Do It

Position a bucket under the discharge pipe connected to the T&P valve to catch the water that will flow out.
Lift the valve lever and hold it for a few seconds.
Release the lever. Water should stop flowing completely once the lever is down.
If the valve drips or leaks after releasing, or if the lever won't reseat, replace the T&P valve.

Clean tankless water heater inlet filter Once a year
Flush and descale tankless water heater Once a year
Flush water heater Once a year
Replace water heater anode rod Every 5 years

Part Of

Plumbing Water Heater

Last updated 22 September 2026

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