Check Your T&P Relief Valve
The T&P relief valve is a safety device that releases water if the temperature or pressure inside your water heater builds too much. When you start seeing sizeable puddles around your water heater, it’s likely the valve is worn out or there’s another issue causing the temperature and pressure to rise.
How to check your T&P relief valve
Test the water pressure using a hose bibb gauge. If you don't already own one, you can buy a hose bibb gauge at your local hardware store. The gauge has a swivel female hose connection on one end and a gauge on the other end. Screw the female end onto an outside hose faucet connection and open the valve.
Your pounds per square inch (psi) should be read about 60 on the gauge. If the pressure reading is over 80 psi, then you'll need a main line pressure reducing valve installed.
Check that the temperature of your hot water is close to your water heater's thermostat setting. Before checking, make sure no one is using hot water or has used a large amount of hot water (e.g., running a hot shower, dishwashers, or washing machines) in a little while.
You can test your water temperature with a standard cooking thermometer. Find the bathroom or kitchen tap closest to your hot water heater and turn on the hot water to full. Let it run for three minutes to ensure you're getting water from the tank instead of the leftover water from your pipes. Place a cup or bowl under the tap to collect some water, then put the thermometer end into the water until it finishes reading the temperature. The reading on the thermometer may not be equal to your thermostat, but it should be close.
CAUTION: Be careful not to burn yourself whenever you're working around hot water.
If the temperature or pressure were too high, you'll want to investigate and see what's causing the rise before your valve stops letting out water.
However, if both the temperature and pressure are normal and the valve is still leaking, then the valve itself is faulty.
If this doesn't seem to be the problem, and the water is still too hot, consider some other issues.
What To Do If Your T&P Relief Valve Is Leaking
Your T&P relief valve keeps your water heater working at a safe pace. Once the valve starts acting up, you’ll want to replace it immediately — otherwise, your water heater could quickly break down.
NOTE: This content is for informational purposes only, and HomeX and its affiliates disclaim all liability related to it. If you decide to perform any tasks based on this information, you assume all risks, including the risk of loss or damage to property or personal injury.
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