Pressure Relief Discharge Pipe Goes Through Ceiling : )

Old 08-07-15, 07:26 PM
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Pressure Relief Discharge Pipe Goes Through Ceiling : )


Everything I've learned about water heaters indicates that the pressure relieve valve is usually connected to an open pipe which will just discharge the released water on to the ground near the heater.

Mine, however, has a little pipe with another valve at the bottom (which was closed). Between that valve and the relief valve there is a T junction and that pipe goes through my ceiling.

The guy at Lowes was bewildered by this but decided that it must be a combination water/air pressure valve that discharged at the roof.

I guess that makes sense, but I've never seen anything like this in pictures on the web.

Can anyone confirm that this makes sense (and that the lower valve should be kept closed).

Old 08-08-15, 05:36 AM
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Going to need a picture.
One of last places you want to be asking code questions is at the box store.
Got a model # and make of the heater?
Old 08-08-15, 09:50 AM
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There should NEVER be any kind of shut-off valve on the discharge of a safety valve. If the discharge piping goes upward there MUST be an open drain from the lowest point to prevent any water from sitting in the safety valve discharge housing.

Like Joe, I also want to see a picture of this arrangement.
Old 08-08-15, 01:55 PM
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Mine, however, has a little pipe with another valve at the bottom
And, the pipe from the relief valve should NEVER be reduced to a small pipe.
Old 08-08-15, 02:18 PM
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Most hot water tank relief valves just open to the floor. Put a 5 gal bucket under it. As others have said, no valve and no up ward discharge.

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