My water heater's pressure relief valve is leaking. What should I do?
- Tim Friedrich
- Sep 5
- 2 min read
Updated: Sep 9
Your water heater plays an important role in making your day go smoothly – from hot showers to the laundry. And yet, it isn’t something we give much thought. That is, until you notice a problem like water dripping from the pressure relief valve.
That small valve plays a big role, and a leak can leave homeowners wondering: is this a quick fix, or a sign of something bigger?
Here is what you need to know.
Every water heater is equipped with a temperature and pressure relief valve, called the T&P valve. Its job is to release water if the pressure inside the tank gets too high. Without it, your water heater could become over-pressurized, creating the risk of tank damage.
Common reasons for a pressure relief valve leak
Sometimes a leak indicates a simpler maintenance issue, other times may be a sign of a bigger problem.
Excessive pressure - If your home’s water pressure is set too high, the valve may open frequently, allowing small amounts of water to escape.
High water temperature - A faulty thermostat can cause water to overheat, building pressure that forces the valve to release.
Sediment buildup - Over time, minerals in the water can settle in the tank, interfering with normal operation and stressing the valve.
Worn-out valve - Your water heater’s pressure valve can weaken or corrode, eventually leading to leaks.
What to do if your pressure relief valve is leaking
Here are steps to take if you notice water around your water heater’s pressure relief valve:
Check your water pressure - A professional plumber can measure and adjust it if needed. High pressure is a common and fixable cause.
Inspect the temperature setting - Most water heaters should be set around 120°F. If it’s higher, the system may be overheating.
Look at the valve itself - If it’s corroded or visibly damaged, you’ll likely need to replace it.
Remember: Don’t ignore persistent leaks. Even a small, steady trickle can lead to higher water bills and could mean that pressure is building in the tank.
When it doubt, call a plumber
If you’re unsure why the valve is leaking, or if the leak continues after basic checks, it’s time to call an experienced plumber who can perform an inspection and determine whether the valve or the entire heater needs repair or replacement.
At Allied Reddi-Rooter, we’ve helped Cincinnati homeowners with water heater issues for decades. Our team can diagnose the problem quickly, replace a faulty valve if needed, and ensure your water heater is operating safely and efficiently.
