Does our water heater valve pose any efficiency or health/safety risks, and if so, can anyone offer DIY solutions?
Asked by Yasmin Philippe 
6 months ago
Last Updated: May 31, 2024
Hey guys, quick question – I saw that our water heater valve is in this condition. Does anyone know if it could impact how well it works or pose any safety issues? And if it is an issue, any suggestions on how I can fix it on my own would be really helpful. Thanks in advance for any insights!
You might consider replacing yourself, however you should drain some water from the tank at least below the T&P valve, but ensure you turn off the cold water supply by checking the information tag. The water heater is from 2008, so before it starts leaking and causing a mess, it wouldn’t hurt to start thinking about a replacement.
That’s the pressure relief valve. You don’t have to worry about touching that water, it just drains outside. But it’s concerning that it’s corroded.
Replace or check regularly as high failure rates can lead to leaks. The pressure relief valve is crucial as it can prevent a potential disaster.
Your heater is over 15 years old. It’s way past its expected lifespan. It’s time to upgrade to a new one.
Wow, 19 years with the same water heater? That’s like ancient history in the world of water heating! Honestly, it’s probably not worth investing any more money into fixing that old unit. It’s time for a change, my friend. If you’re comfortable with DIY projects, you could take on the task yourself. Just remember to drain some water from the tank, especially below the T&P valve level. And don’t forget to turn off the cold water supply before you start. But at 19 years old, the risk of a leak causing damage is quite high. Whether you go for a brand-new model or a slightly older one, regular maintenance is crucial. Regular checks and part replacements every few years can help prevent disasters like flooding or malfunctions. So, let’s retire that old water heater, shall we?
My pipes started corroding due to city water with added chlorine and fluoride. Even copper pipes developed holes far from any joints. I recently had a high-efficiency water heater installed, complete with a heat pump and high-efficiency setting. Since then, my hot water costs have been halved depending on the mode I use.
If the pressure relief valve is releasing enough water to cause corrosion, it might be time to replace it. Many others here have mentioned that 18 years is quite old for a water heater. The tank could be close to breaking or the efficiency may be so low that you’re spending a lot on hot water. Personally, I would suggest replacing the whole unit instead of just the valve. But changing the valve is a straightforward job if you decide to go that route.
It’s a safety concern if you have the discharge line reduced to 1/2 inch. First off, what’s your incoming water pressure? Those systems are designed for 125psi.
Larry, could you provide more details about the safety issue?
Hey Larry, it seems like you’re changing from 3/4 npt to 3/4” compression with plastic tubing. Is water coming out of the end of the tubing? If your water heater is functioning properly and you’re in an unfinished basement with a drain nearby, I would suggest letting it run its course.
It’s the outer diameter, not the inner diameter, that’s the same
A 3/4” pipe doesn’t share the same outer diameter as a 3/4” tubing
Sure thing. But that still doesn’t comply with regulations and poses a safety risk
Why not? If it has the same inner diameter, where is the code problem?
Used plastic tubing on a discharge line. As a compression fitting, they may not have the same inner diameter, causing a restriction on the discharge line. The concern is why it is discharging. These fittings are rated for 150psi/210° (previously said 125). The specifications are on the tag. They do not usually fail unless they are under stress or have debris in them. What is the real underlying issue? Without alarming the homeowner, there are several videos on YouTube that I watched in trade school about what can happen to a HWT when it discharges. I have witnessed some of those scenarios in person, and it is not pleasant.
Regarding the TPS, it’s actually there to prevent the tank from exploding in case the pressure gets too high. It’s a safety feature that allows the pressure to escape and release the water. A hot water tank from 2008 might be due for a replacement. Home insurance typically doesn’t cover damages caused by water heaters that are over a decade old.
Was really helpful in sharing information about home insurance. Thank you!
As a REALTOR, I encounter this issue often. It’s a frequent finding during home inspections due to the associated risks. The valve on the tank is usually the culprit for leaks over time, leading to water damage. I recommend replacing the entire tank for your peace of mind. If purchasing a new unit isn’t feasible, renting one is typically a cost-effective option at around $20 per month.
Do yourself a favor and consider upgrading to a tankless gas hot water heater. This way you only heat water when you need it, not all the time.
Just a heads up, those don’t last as long and it’s recommended to get them serviced annually. My home inspector always mentions the same thing whenever he comes across one – he thinks they’re better off rented than purchased.
You know, in the time I’ve had mine, it’s been a real money-saver on gas. I feel like everything these days is made to be disposable, even the ones with tanks. We’ll just have to wait and see how much life we can get out of it! 😄
Haha, did you know that in the time you’ve had yours?
As a plumber and gasfitter, I can confirm.
Yeah I got mine back in 2020 before prices went crazy due to Covid. I only got around to installing it last year after my tank broke. I know quite a few folks who’ve had theirs for ages and have had positive experiences. It’s definitely helped me save on my gas bill. I’ve heard that the electric tankless ones aren’t as dependable.