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Old 06-14-2010, 12:57 PM   #1
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Water Heater discharging water from drain cock.


Hello all.

I have a water heater about 3 or 4 years old. I have a bucket under the drain cock because of a small leak. Would fill this small bucket up in a bout a month. Very small leak. So I just left and emptied out the bucket once in while.

In the last week, this bucket is full and over flowing with water every day. I'm not losing any hot water. I can't tell when it happens, or if the water is hot originally when it comes out.

Should I replace the the drain cock, or could it be something else. And why could this be happening?

Thanks!

Rudy

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Old 06-14-2010, 01:05 PM   #2
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Water Heater discharging water from drain cock.


is it coming from the drain or the TPR valve?

If from the drain, one of two things would have to happen:

1. the drain is not sealing well
2. there is enough pressure building up that overcomes the valve.


If #1, you might consider replacing the valve

if #2, you may have a malfunctioning TPR along with something such as a malfunctioning thermostat.

so just to be sure: it is coming from the drain or the TPR tube?

and is this an electric heater or gas?

have you ever opened the TPR to be sure it is still functional?

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Old 06-14-2010, 01:39 PM   #3
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Water Heater discharging water from drain cock.


Hi Nap!

It's a gas water heater. And the water is coming from the drain. I haven't opened the TPR tube. Can I just open it with a bucket underneith, or do I need to prep something?

Thanks!
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Old 06-14-2010, 01:50 PM   #4
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Water Heater discharging water from drain cock.


the tpr is simply a pressure limiting valve. It is spring loaded and SHOULD simply re-close and seal when you release it.



Some of them do have a tendency to seep.

Electrical heaters have a lot more problem with t-stats than gas does but it is not impossible for a gas fired heater to have problems with the state. Have you noticed any increased water temp at any time?
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Old 06-14-2010, 02:04 PM   #5
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Water Heater discharging water from drain cock.


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Originally Posted by Rudy68 View Post
Hi Nap!

It's a gas water heater. And the water is coming from the drain. I haven't opened the TPR tube. Can I just open it with a bucket underneith, or do I need to prep something?

Thanks!

There should be a little metal clip you can flip up, that should open the TPR valve. You might want to have a bucket under the pipe. The water will come out with some force, and should be pretty warm.

I had an older water heater in my old apartment, I had to play with the TPR to make it seat properly or else it would leak.

Also, is the leak coming from the drain valve, or from the drain valve valve fitting and dripping off the valve. If it is a Nylon shut off, it might be as simple as taking the old valve off and teflon taping the fitting.
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Old 06-14-2010, 02:23 PM   #6
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Water Heater discharging water from drain cock.


Hi Guys!

There is no increase in water temp. It is coming from the drain and not around the fitting or anything.

Is it possible to replace the drain cock, and I should be good?

Thanks!

Rudy
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Old 06-14-2010, 02:30 PM   #7
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Water Heater discharging water from drain cock.


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Is it possible to replace the drain cock, and I should be good?
Yes, or you could attach a second shut off and just leave the maufactured shut off on
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Old 06-14-2010, 04:58 PM   #8
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Water Heater discharging water from drain cock.


If the drain cock is just dribbling --I'd suggest a screw on "bottle cap"---They are available wherever hoses are sold.---Changing the drain cock is a lot more work than screwing on a cap.
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Old 06-14-2010, 05:15 PM   #9
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Water Heater discharging water from drain cock.


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If the drain cock is just dribbling --I'd suggest a screw on "bottle cap"---They are available wherever hoses are sold.---Changing the drain cock is a lot more work than screwing on a cap.
Oh ya, especially on an older water heater.

I will say though that whenever I get a new water heater, I replace the OEM valve with a ball valve. It is much easier to flush a tank with a ball valve (allows full unrestricted flow through the valve) than whatever kind of valve it is that comes on them (can't remember what it is called at the moment)
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Old 06-14-2010, 06:16 PM   #10
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Water Heater discharging water from drain cock.


Thanks for the help. I think I'll replace the drain and see what happens!
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Old 06-15-2010, 07:35 AM   #11
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Water Heater discharging water from drain cock.


Quote:
Originally Posted by oh'mike View Post
If the drain cock is just dribbling --I'd suggest a screw on "bottle cap"---They are available wherever hoses are sold.---Changing the drain cock is a lot more work than screwing on a cap.

I agree this is the way to go without opening a hornets nest.
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Old 06-15-2010, 08:31 AM   #12
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Water Heater discharging water from drain cock.


I pulled off a drain valve on a 14 year old water heater without a problem
And also replaced the drain valve on our 22 year old boiler

Turn the WH off before you drain it
--maybe the night before
--then take a shower in the am to use the hot water in the tank

Don't turn it back on until its full of water again
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Old 06-15-2010, 10:58 AM   #13
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Water Heater discharging water from drain cock.


I'm with "nap" as far as changing the drain valve on new water heaters. I do this and the charge to the owner is minimal, but the benefit down the road is worth it. David

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