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Old 03-16-2013, 12:51 PM   #1
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Electric water heater TPR valve leaking


I noticed my TPR valve was leaking on my 8 year old water heater. I replaced it, no change. I lowered the water pressure, no change. I lowered the water temperature, no change.

What next?

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Old 03-16-2013, 01:40 PM   #2
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Electric water heater TPR valve leaking


Since you replaced the TPR and it still leaks, there is a pretty good chance the TPR is doing its job, specifically sensing an overpressure or over temperature condition. Likely the problem is over pressure, since you apparently turned down the temperature with no effect.

The pressure in your system can go over normal if you have a waterlogged expansion tank. If you are on private water (pump), you almost certainly have such a tank, and if the bladder fails internally, you can be left with a situation where there is no expansion room for water when it gets hot, which would lead to your symptoms. If you are on city water, there may not be an expansion tank. Perhaps you can tell us how your water supply is set up.

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Old 03-16-2013, 02:09 PM   #3
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Electric water heater TPR valve leaking


Install a hot water tank expansion tank on the cold water inlet to the tank.
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Old 03-16-2013, 02:10 PM   #4
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Electric water heater TPR valve leaking


describe the frequency of the leak, and the amount of water coming out?

Agree with above : You replaced it, no change, that means the valve is doing it's job, either over pressure (most likely) or over temperature.


Either the regulator has failed and your pressure is just high (you say you adjusted it, did it stay where it was at when you changed the pressure? Are you sure you lowered the pressure, not raised?) or it is slowly creeping up over a short period of time.

OR

The water in the heater is expanding, and has nowhere to go. You alleviate this by installing an expansion tank.
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Old 03-16-2013, 06:37 PM   #5
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Electric water heater TPR valve leaking


I have city water no expansion tank.

just replaced the elements they were a bit crusty but I've seen worse, there was some calcified gravel in the bottom of the tank but way below the element.

If that doesnt fix it I think its time for a new heater?
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Old 03-16-2013, 07:18 PM   #6
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Electric water heater TPR valve leaking


Quote:
Originally Posted by shmelvin View Post
I have city water no expansion tank.

just replaced the elements they were a bit crusty but I've seen worse, there was some calcified gravel in the bottom of the tank but way below the element.

If that doesnt fix it I think its time for a new heater?
You haven't said what your pressure is. How do you know you lowered it? Is the pressure staying consistent?
You must have a PRV- if so you need an expansion tank as mentioned earlier.
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Old 03-16-2013, 07:54 PM   #7
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Electric water heater TPR valve leaking


As hot water expands in your hot water tank it needs somewhere to go. If you have a pressure reducing valve or check valve on your incoming water you may need an expansion tank because the PR valve bypass may have blocked over time.
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Old 03-16-2013, 08:45 PM   #8
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Electric water heater TPR valve leaking


Well it's still leaking not steady i think as heating up and expanding
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Old 03-16-2013, 08:50 PM   #9
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Electric water heater TPR valve leaking


reread posts 6&7.
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Old 03-16-2013, 08:50 PM   #10
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Electric water heater TPR valve leaking


Quote:
Originally Posted by shmelvin View Post
Well it's still leaking not steady i think as heating up and expanding
T&P valves are a safety device. If it's leaking- even a little, you need to be concerned. Run the proper checks on your water pressure. Replace the PRV if needed and install a expansion tank
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Old 03-17-2013, 08:29 AM   #11
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Electric water heater TPR valve leaking


I turned down the water pressure at the regulator and saw a noticable drop in pressure at the shower and faucets.
I have had no problems with the system up until last week.
The tank was installed 8 years ago (with a 6 year warantee)

Last edited by shmelvin; 03-17-2013 at 08:57 AM.
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Old 03-17-2013, 08:35 AM   #12
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Electric water heater TPR valve leaking


How many problems have you had with it for 8 years? If it operated for 8 years OK you shouldn't need a expansion tank now unless something was changed.
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Old 03-17-2013, 09:02 AM   #13
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Electric water heater TPR valve leaking


thatís the crazy thing...Nothing has changed it just started to leak so I changed PR valve. this morning I have no leaks but the hot water has not been used. It seems to happen when the shower is in use obviously draining adding cold water and heating up causing expansion. no one in my neighborhood has an expansion tank.
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Old 03-17-2013, 09:33 AM   #14
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Electric water heater TPR valve leaking


Read post 7 or leave it leaking. Not my house.
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Old 03-17-2013, 12:21 PM   #15
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Electric water heater TPR valve leaking


If you just changed the pr valve that's not good enough.
Now you have to set the pressure you want to achieve.

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