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Old 03-25-2013, 09:33 PM   #1
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Water heater pressure relief question

I have a friend who just purchased a house. I think its from the 50s and the outside construction is brick. I can't remember if the inside is brick or not.

The "newish" water heater is located in a closet in the center of the house. There is no pressure relief pipe on the water heater at all right now. Just a pressure relief valve. There is no drain inthe floor. I would like to help install a pipe to direct the water if the valve ever opens.

Can it be directed into a bucket on the floor?

If not, I will have to pipe it into the attic and then over a room and then down the outside of the house. I'm hoping to avoid that.

What do you think?


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Old 03-25-2013, 09:52 PM   #2
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Can it be directed into a bucket on the floor? No.


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Old 03-25-2013, 10:14 PM   #3
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Thank you. I read elsewhere the pipe has to be in a downward direction so no water hgets trapped in the pipe to mold too. Doesn't leave many options.
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Old 03-25-2013, 10:17 PM   #4
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Can you pipe into the floor joist and then to the outside wall?
When posting in forums, letting us know your location will help others give better feedback/advice/solutions to your questions
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Old 03-26-2013, 05:29 AM   #5
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The heater should be sitting in a pan and the drain for the pan runs outside, the drain for the relief valve sits in the pan a few inches off of the bottom.
Reason being is it starts leaking or pops off someone will see it leaking.
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Old 03-26-2013, 07:41 AM   #6
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Downward run only 6 inches above the floor, if you run it to the exterior of the home you'll need a visible air gap on the line.

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Old 03-26-2013, 09:32 AM   #7
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A water heater must have a properly installed temperature/pressure relief valve. Otherwise a malfunction with the heating components can cause it to explode. Install the relief valve now with outlet pipe pointed down and ending less than 6 inches from the floor. You can plan on what else to install later.

A water heater should have an expansion tank. Some inspectors insist that an expansion tank be installed above the heater but the pressure tank of a water system with a well pump will serve the purpose when there are no closed valves between it and the water heater.
The good conscientious technician or serviceperson will carry extra oils and lubricants in case the new pump did not come with oil or the oil was accidentally spilled, so the service call can be completed without an extra visit.
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Old 03-26-2013, 06:11 PM   #8
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It is a sever safety issue that a person can see if a relief valve has tripped. That is why you need an air gap if you run it out of the room. If it goes off and you ignore it you could end up killing the house and what lives there.


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