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Old 03-19-2006, 03:03 PM   #1
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Hot water heater help


I have a hot water heater in my restaurant that has a semi-steady leak flowing out of the pipe running horizontal on the tank.. any suggestions please??:confused:

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Old 03-19-2006, 10:00 PM   #2
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Hot water heater help


Running horizontal on the tank?

Going into the top of the tank (and just happens to be horizontal)?

Coming out the side of the tank, with a little handle (for lack of a better term) on it? (if it is, when you pull this handle, hot water will come out much faster than a little leak)

Out the side of the tank at the bottom? (looks like a garden hose spigot)

Please clarify and we'll be happy to help.

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Old 03-19-2006, 10:59 PM   #3
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Hot water heater help


Thanks for the reply.... the pipe comes out of the side, and has a little clip on it too. The unit hasnt been touched, just started to leak. Its a gas w/h.
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Old 03-20-2006, 03:30 AM   #4
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Hot water heater help


That sounds like the Temp. & Pressure Relief Valve (T & P Valve).

If it's leaking out THROUGH the valve (out the end), then either:

- The water is too hot or under too much pressure, or...
- The valve is bad. (more likely of the two...and cheaper to fix)


Turn off the water feeding the W/H and drain the water down below the level of the valve. Take out the valve (should be threaded in...normal thread direction...it'll be tight) and take it to a hardware store and get another JUST like it (as in settings and specs.). While you're there get some telfon tape if you don't already have any. Wrap teflon tape around the threads of the new valve (clockwise.. if you're holding the valve looking at the little white tube...as if you're inside the W/H looking out), and thread the new valve back in place, tighten as needed to stop any leaks around the threads. Turn on the water and check for leaks coming through the valve. If the new valve does the same as the old one, replace the W/H.

NOTE: This valve is NOT something you want to replace with a plug, even temporarily. Google: "exploding water heaters" and I'm sure you'll find more pictures than you care to look at of what happens when that's done.


If it's leaking around the threads, tighten it until it stops or remove and replace the teflon tape as described above.

If you have any problems, come back and ask...good luck.
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Old 04-10-2006, 05:15 PM   #5
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Hot water heater help


if you are looking for the replacement valves look at www.plumbersurplus.com. they seem to have a lot of safety valves for water heaters, as well as a huge selection of water heaters. they also gave me a link to explain how tankless water heaters work. www.tanklesswaterheaterguide.com
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