Most homeowners aren’t all that familiar with the detailed inner workings of their home appliances. For the most part, your oven, dishwasher, dryer and other appliances all just work. The same thing goes for your water heater. Often tucked away in a garage, closet, or basement, it’s easy to forget about the water heater—despite how important it is to your family’s daily routine.

Problems typically arise when things heat up. Whether due to a change in the temperature setting or due to a malfunction, higher water temperatures mean more pressure inside the tank shell. At about 200 degrees, the water heater is starting to feel the stress of a higher PSI.

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Homeowners here in Albuquerque know and trust our plumbers to do the job right. We’re proud to be your home’s best friend. Generations of homeowners have turned to our team to help them with their plumbing and water heater problems.

This continues until enough pressure is released for the valve to close. Plumbers refer to this as “blowdown.” While you’ll have some water on your garage or closet floor that you’ll need to clean up, it’s far better than the alternative. Without a functioning valve, the pressure in the water heater can climb to dangerous levels. Eventually, the tank may “burst,” causing water to flood out of the appliance and into your home.

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Your relief valve should last as long as your water heater does. However, T&P valves are known to encounter issues that cause them to malfunction. A safely functioning valve relies on its ability to both open (when it detects high pressure) and close (when it detects that the pressure issue has been resolved). If your valve is stuck and can’t do one or both of these things, it needs to be replaced as soon as possible.

I know very little about home improvement (first time home owner). I had my hot water heater (located in my garage in the corner on a small pedestal) replaced in March of 2021 by a professional.

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Your water heater warms and then stores heated water inside of its metal tank. Most water heaters store water at between 120 and 140 degrees—this is typically warmer than what’s needed at the tap, but not cool enough to become cold by the time it reaches your shower heads and faucets. At this temperature, the PSI (pounds per square inch) pressure inside your water heater is well within the parameters your water heater was designed to handle.

This exact issue just happened to me: water heater pressure - temperature relief valve was completely open, gushing water.. We noticed the water was not super-heated, so a stuck thermostat was ruled out.. It turns out my house has a Pressure Reducing Valve which failed, causing the water pressure to jump rapidly, which triggered the T&P valve to open. .. Get a gauge and check your water pressure. If it's too high, a new T&P valve won't solve the issue.

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I closed it and restored water to the house, but it still has a steady drip (once every 15-30 seconds). The drop does not increase when hot water is being used, so it seems steady.

Yes, it is safe to assume that the T&P valve has failed and needs to be replaced. Even without the flood, a constant dripping is a sign of a problem.

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Luckily, testing your valve doesn’t require increasing the temperature and pressure to unsafe levels. Instead, you’ll need to position a bucket under the discharge pipe. Carefully pull the valve open. If water comes out of the discharge tube and into your bucket, that’s a good thing. Release hold of the valve. Its lever should “snap” back into place and water should stop coming from the tube. This, too, is an indication that your relief valve is working as it should.

It’s a good idea to routinely test your pressure-relief valve. As we’ll explain in a section below, T&P valves can malfunction or become “stuck” after years of no usage. You should ensure yours is working so that it can continue to protect your water heater and your home. Most homeowners pair this with an annual water heater flush—this makes it easier to remember this important task.

My main question: should I do more debugging or is it safe to assume I just need to replace the T&P valve? My issue seems more extreme than most videos/articles about fixing a leaking valve and I want to know if I should investigate more serious concerns with the tank or plumbing?

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As we’ll explore in the sections below, T&P valve problems can pose a risk to both your water heater and your home. If you think you might need T&P valve replacement, you need to call our plumbers right away. You don’t want to procrastinate on water heater problems. At best, your water heater could stop working, leaving you and your family without hot water. At worst, your water heater tank could fail, potentially flooding your home. The stakes here are real.

Watch this video to see what a T&P valve looks like, how it opens to release pressure from the water heater, and what our plumbers need to do in order to replace a faulty valve.

However, that leaves open the question of whether there is actually a water heater problem. It is possible that the T&P valve failed independent of the temperature and pressure of the water heater - i.e., just a T&P valve problem.

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Last night, a neighbor came to my door to let me know my garage was leaking significant water. I went down and my entire garage was flooded (~3 inches tall). The water was flowing full force from the copper pipe attached to the T&P Valve.

Like everything else associated with your water heater, this valve is subjected to the long-term spread of corrosion. This can cause the valve to no longer emit water or steam, or to spring a leak. If you’re noticing dripping water coming from the T&P valve, you have a problem that goes far beyond the small pool of water on the floor. A leaking valve indicates a pressure problem, which means your water heater is going to struggle to keep its water at the right temperature.

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Your water heater pressure-relief valve—also known as a T&P valve—is a critically important safety feature of your water heater. In short, this valve helps alleviate excess pressure from within your water heater, helping prevent potential tank bursts and leaks. A T&P valve can be found on every standard water heater and on some tankless water heaters.

If your pressure-relief valve is either stuck or leaking, you need to call the plumbers here at Wagner. T&P valves were not designed to be replaced by homeowners. In fact, most manufacturers designed these valves to be hard to remove, so that this critical safety feature couldn’t be intentionally disabled. You’ll need our plumbers, with their tools and expertise, to handle the job.

This is where the water heater pressure-relief valve comes into play. When the pressure reaches a certain point, it forces the valve open. Your relief valve is connected to a long discharge tube. When the valve opens up, both steam and hot water are forced out of this tube and onto the ground around your water heater.

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If there’s one piece of your water heater that you should know, however, it’s the pressure-relief valve. This water heater safety valve is crucial to the safe operation of your water heater. In this article, we’ll go through what this valve is, how exactly it works, and what you need to do when something goes wrong with it.

17 Apr 2019 — To test the valve to ensure that it's working properly, simply raise and lower the test lever several times so it lifts the brass stem that it's fastened to.

After shutting off water to diagnose, I noticed the T&P valve was fully opened (by itself). Which, after much googling, appears to be unusual. It seems like when it opens and doesn't close, it doesn't fully open (from what I gather) and should only let out a moderate amount of water (not

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It is also possible that the water heater had problems - e.g., a failing thermostat - which resulted in an actual overtemperature/pressure situation. If that is the case then the T&P valve would open, as it should to prevent a tank explosion, but that it then failed to close after relieving the overtemperature/pressure problem. If that's what happened then yes, you still need a new T&P valve, but you may actually need something else replaced - anything from a thermostat on up to the entire water heater.