A water heater relief valve may leak because it is doing its job and releasing extra pressure or heat, or because the valve itself has worn out. Either way, a leaking relief valve is a sign that the water heater should be checked, not something to cover up or ignore.
The relief valve is a safety device, usually on the top or side of a storage tank water heater, with a pipe running down toward the floor. It is designed to open if the temperature or pressure inside the tank gets too high.
Why the Valve May Release Water
A dripping or discharging relief valve can have several causes. Some of the possibilities include:
- pressure in the plumbing system that is higher than the valve allows
- water expanding as it heats, with no room for that extra volume to go
- a temperature control problem that lets water get too hot
- debris, mineral buildup or wear that keeps the valve from sealing fully
Telling these apart takes a look at the whole setup, including the water pressure and how the heater is installed. A leak from the relief valve does not mean the tank itself is failing.
What Not to Do
Never cap, plug or block the relief valve or its discharge pipe. Do not remove the valve or try to adjust it, and do not tie the lever shut. If the valve cannot open when it needs to, the tank could build up dangerous pressure.
Also avoid raising the water heater’s temperature setting to fix a different problem. Very hot water can cause scalds, and a higher setting may make a relief valve discharge more often.
Safe Steps While You Wait
Keep people, especially children and pets, away from the discharge pipe, since the water coming out may be very hot. Place a bucket or pan under the end of the pipe if you can do so without touching hot water or reaching over the unit. Keep the area around the heater clear and dry, and stay away from wet electrical outlets or cords.
If the valve is releasing a large amount of hot water or steam, or you hear unusual rumbling or popping from the tank, treat it as urgent and call for help. If you also smell gas near a gas water heater, leave right away and call 911 from a safe place.
When Building Staff Should Be Involved
In many Bronx apartment buildings, water heaters are building equipment that only staff should handle. Renters should report a leaking valve to the super or landlord and let them arrange service. Owners of small buildings should note when the leak started and how much water is coming out.
Seeing water coming from the relief valve in your Bronx home? Call (929) 209-6183 for help with a water heater problem. We are available 24/7, including nights and holidays.
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