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Old 12-11-2012, 12:52 PM   #16
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New water heater, hot water doesn't last long.


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Thanks D. I was planning on checking that out first thing after work today. Hopefully that's all it is. If not, it's under warranty so I'll let GE handle it.
I also vote on a bad or missing dip tube.

The only thing GE will do under the guarantee is give you a new water heater. You will have to remove the old and install the new.

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Old 12-11-2012, 04:36 PM   #17
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New water heater, hot water doesn't last long.


I removed the cold nipple, the dip tub was not connected to it. But it was in place with a rubber grommet around it, so I'm not sure if that was the problem. Either way, I removed the dip tube and will get a new one tomorrow and see what happens. If that doesn't work, I'll be calling GE for a replacement water heater.
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Old 12-11-2012, 05:06 PM   #18
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You did not solder down close to the top of the water heater on the cold in line did you? You need to solder up a short length of pipe with a transition fitting, a short length (12-16 inches) and a Ball valve in your vice, let it cool and then thread it onto your cold-in nipple if you are using copper, or you will melt the dip tube. Did you know this? Just wondered.
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Old 12-11-2012, 05:10 PM   #19
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You did not solder down close to the top of the water heater on the cold in line did you? You need to solder up a short length of pipe with a transition fitting, a short length (12-16 inches) and a Ball valve in your vice, let it cool and then thread it onto your cold-in nipple if you are using copper, or you will melt the dip tube. Did you know this? Just wondered.
Didn't use solder/sweat. I used flex stainless hoses coming from the copper pipes.
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Old 12-11-2012, 05:49 PM   #20
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New water heater, hot water doesn't last long.


If a dip tube is functioning correctly, water drained from the drain valve will initially be hot but rather quickly turn cold.
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Old 12-12-2012, 05:00 AM   #21
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The dip tube on this GE model has a lip at the top and a rubber grommet that is under the nipple. Looks like the rubber grommet should be under the lip with the lip resting on the top of the grommet, so it would create a seal. When I took the nipple off and looked in, the tube was pushed down further and the lip was inside the rubber grommet towards the bottom of it (wish I had a pic to post because it's hard to explain without seeing it), so I don't think there was a good seal and maybe some cold water was traveling passed the tube and out into the tank. I tried pulling the tube up so the lip would be on top of the grommet, but I damaged the lip. So I pulled the tube all the way out and am going to buy a new one after work and see what happens.
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Old 12-12-2012, 01:20 PM   #22
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New water heater, hot water doesn't last long.


The o-ring/grommet is supposed to fill the gap between the outside diameter of the dip tube and the inside diameter of the nipple. It's not supposed to be on top of the nipple with the dip tube pressing on it.
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Old 12-12-2012, 04:39 PM   #23
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The o-ring/grommet is supposed to fill the gap between the outside diameter of the dip tube and the inside diameter of the nipple. It's not supposed to be on top of the nipple with the dip tube pressing on it.
I bought a new dip tube. Plastic pipe that's flared at the top with the rubber grommet below the flare. I put it in, and put everything back together. No one has been at the house all day, so no hot water was being used. The flame is heating up the water now, I'll let you know if it worked or if I'll be calling GE for a new water heater.
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Old 12-13-2012, 01:33 PM   #24
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I asked you if you applied heat down by the cold in nipple, and if you made up a female adapter, minimum 12 inch stub out and ball valve, then screwed it onto the nipple. You never answered. Did you melt the original dip tube?
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Old 12-13-2012, 02:20 PM   #25
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New water heater, hot water doesn't last long.


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I asked you if you applied heat down by the cold in nipple, and if you made up a female adapter, minimum 12 inch stub out and ball valve, then screwed it onto the nipple. You never answered. Did you melt the original dip tube?

No, I didn't melt the tube because I didn't do any sweating. I used 12" flex lines with snake bites coming off the copper tubing. The original tube was not sitting correctly and the flared end was pushed down passed the rubber grommet, letting the cold water into the tank rather than down the tube. Replaced the tube, put everything back together, and had a hot shower later on that evening. So it looks like problem resolved.
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Old 12-13-2012, 02:20 PM   #26
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$6 new dip tube = HOT WATER!!

Thanks for the info and help guys.
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Old 12-13-2012, 02:21 PM   #27
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New water heater, hot water doesn't last long.


I bet it's the dip tube!

Last edited by fred54; 12-13-2012 at 02:22 PM. Reason: edited two paragraphs making the case for it not being the dip tube.
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Old 12-13-2012, 02:44 PM   #28
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Glad to hear it. Happy Sudsing!

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