Installation And Support Of Water Heater Expansion Tanks. - Plumbing - DIY Home Improvement | DIYChatroom
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Old 04-23-2012, 04:07 PM   #31
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Periodic inspections of the tightness of the strap might be a good thing. I don't have a clue if this is a valid concern but am wondering if the daily expansion and contraction of the tank might loosen the strap just enough to allow the tank to slide down a bit at a time every time the tank is cooled.

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The tank is about 3 feet away from the water heater, and only carries cold, so thermal expansion is not going to be huge, although the tank is in the attic where it can get pretty hot. I have insulation around the tank and pipes just in case it gets to freezing in the attic, but that's unlikely given our climate, and the fact that the garage is insulated and will keep leaking a little heat up into the attic on nights when it gets below freezing outside. Plus the proximity to the water heater should keep water in the tank from freezing.

The tank is being supported by the piping, and the piping is supported by pipe supports. The strap is merely keeping the tank tight to the wall, and keeping it from rotating away.

But now that I'm thinking about it, I could throw in a couple copper straps just on either side of the tee, just to make sure. 24 pounds is not going to stress the joints too much, as long as the pipe is well supported.

My plumber did screw up and put a shutoff before the expansion tank. But since that line supplies the kitchen, I'm sure we'll notice that the water is off. And the house never had an expansion tank for the last 28 years, so I'm pretty sure we'll get by on a temporary basis.

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Last edited by M3 Pete; 04-23-2012 at 04:16 PM.
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Old 04-23-2012, 04:35 PM   #32
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The tank is being supported by the piping, and the piping is supported by pipe supports. The strap is merely keeping the tank tight to the wall, and keeping it from rotating away.

But now that I'm thinking about it, I could throw in a couple copper straps just on either side of the tee, just to make sure. 24 pounds is not going to stress the joints too much, as long as the pipe is well supported.
Piece of mind would be well worth the effort .

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Old 05-03-2012, 06:18 PM   #33
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Here is a new solution that I understand will be available by the end of May '012. Uses quick-release bands to attach the tank.
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Old 05-03-2012, 06:28 PM   #34
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Here is a new solution that I understand will be available by the end of May '012. Uses quick-release bands to attach the tank.
Looks good. Wonder if they will be making them for 4.4 - 5 gallon tanks?

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Old 05-03-2012, 07:59 PM   #35
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Note that the amount of water that enters the expansion tank under normal operation is the same no matter where in the system the expansion tank is located.

The amount of water that enters the expansion tank depends on the size of the water heater tank and the before and after temperatures of the water inside being heated.
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Old 05-03-2012, 08:57 PM   #36
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This tank was installed by a mechanical contractor at work 6 years ago and I think it is a bit whoppyjawed on one end....

I welded up my own bracket for it before the tank broke off the 1-1/2 " cold line and flooded the mechanical room. ...

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Old 05-03-2012, 10:00 PM   #37
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This tank was installed by a mechanical contractor at work 6 years ago and I think it is a bit whoppyjawed on one end....

I welded up my own bracket for it before the tank broke off the 1-1/2 " cold line and flooded the mechanical room. ...

That is pathetic.
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Old 05-03-2012, 10:04 PM   #38
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Note that the amount of water that enters the expansion tank under normal operation is the same no matter where in the system the expansion tank is located.
.
True. But I would think you may not want to install one on the hot water side of the water heater, because then you have 1-3 gallons of cold water in connection with your hot water line, and I'd think it would tend to cool off the hot water as it passes by, as the cold water sinks.
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Old 05-03-2012, 10:07 PM   #39
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True. But I would think you may not want to install one on the hot water side of the water heater, because then you have 1-3 gallons of cold water in connection with your hot water line, and I'd think it would tend to cool off the hot water as it passes by, as the cold water sinks.
Besides the fact that manufacturer's installation guide says to never install it on the hot water side.


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Old 05-04-2012, 12:32 AM   #40
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Here is a new solution that I understand will be available by the end of May '012. Uses quick-release bands to attach the tank.
I've always been impressed with Holdrites products. They seem to come up with some real ingenious time saving stuff.
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Old 05-04-2012, 04:53 AM   #41
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That is pathetic.

I am assuming you are not speaking of my bracket

The oddity is, the rest of the mechanical job (plumbing/hvac) was done to perfection. I dont get why some plumbers think that just because the exp. tank is light in their hand, its going to stay that way. Water is about 8 Lbs a gallon of weight.
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Old 05-04-2012, 10:22 AM   #42
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I've always been impressed with Holdrites products. They seem to come up with some real ingenious time saving stuff.
You ever use holdrite stainless flex supplies? They are junk.
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Old 05-04-2012, 12:24 PM   #43
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This tank definitely needs support and quickly. Even a makeshift arrangement with coat hangers and duct tape is better than nothing.
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Last edited by AllanJ; 05-04-2012 at 12:32 PM.
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Old 05-04-2012, 01:13 PM   #44
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Besides the fact that manufacturer's installation guide says to never install it on the hot water side.


well, there is that too ...
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Old 05-04-2012, 09:51 PM   #45
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This tank definitely needs support and quickly. Even a makeshift arrangement with coat hangers and duct tape is better than nothing.
Wait. . . You mean duct tape wouldn't be an acceptable permanent solution?



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