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Old 02-10-2015, 04:23 PM   #1
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Expansion tank


New to the site and really appreciate your professional imput.
I'm having a home built in a subdivision here in Ohio. A friend of mine already had 1 built last year. I was looking at his home and noticed something about his expansion tank for his gas water heater. I 'm not a fan of cpvc anyway but thats whats holding the tank in place. I attached pictures of the setup. Expansion tank laying on its side on top of water heater connected with cpvc. Is this code or am I over reacting to accidents that I think can happen with this.
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Expansion tank-expansion-tank.jpg   Expansion tank-expansion-tank-2.jpg  

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Old 02-10-2015, 04:32 PM   #2
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I don't know if its code or not,
One of the plumbers will be along shortly to let you know.

If the expansion tank fails, you dont want the weight of the expansion tank to depend on the cpvc . However, In this case it is resting on the tank for support.

For safety, i would still strap it better. They can be very heavy when full of water. Just a suggestion.

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Last edited by jmon; 02-10-2015 at 04:47 PM.
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Old 02-10-2015, 05:34 PM   #3
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The expansion tank is supported by the Hot water tank, Not how I would do it but to code. It also ties into the cold inlet that's to code. Only thing I would add is a strap to the tank to hold the expansion tank in place. Use plastic hole strap and 2 small sheet metal screws.

Not a good job I have seen much better but as an inspector if it meets code we are not allowed to grade workmanship.

Last edited by Ghostmaker; 02-10-2015 at 05:36 PM.
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Old 02-10-2015, 06:00 PM   #4
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well I respect you ghost....but that is a piss poor job imo .. I would fire anyone of my men if they did such a job..when they introduced those tanks i believe they wanted them in the verticial position supported on both sides of the tee holding them... while they may have changed some it still is the best way to install them ..either hanging down or mounted upright supported properly so if they fail.... and they will.... it won't cause any damage... I know inspectors don't grade work..but please be one of those guys that speak up to plumbers when they fail to use common sense....ben
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Old 02-10-2015, 06:06 PM   #5
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There is a bracket out there made for just this situation. You can hang it vertically or horizontally from a joist- not bad priced either.
Or a simple drop ear attached to the joist......
It would really clean that up

http://holdrite.com/product/qs-5/
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Old 02-10-2015, 06:08 PM   #6
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If you look at your expansion tank install sheets a horizontal placement is fine. It has to be supported. Like I said it's not what I would do but it does meet the code sections I can apply. I'm not allowed to grade workmen ship because that leads to a lot of issues.

What we look at is code. Is an expansion control device required? If so it can be installed any where in the house on the cold water. (little known fact)

If installed horizontally is it supported per manufacture install instructions. In this case it is.

I would also fire my employee if he did a job like this for wasted materials and gross stupidity. But I can't because no code violation exist. You do not want plumbing inspectors drifting away from the code and enforcing stuff they like. Soon enforcement will not have a resemblance of code. It will just be what one guy thinks it should be. That's not good either.
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Old 02-10-2015, 06:12 PM   #7
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Quote:
Originally Posted by TheEplumber View Post
There is a bracket out there made for just this situation. You can hang it vertically or horizontally from a joist- not bad priced either.
Or a simple drop ear attached to the joist......
It would really clean that up

http://holdrite.com/product/qs-5/
I have one shop out of 100 that installs that strap for the tank. What does that tell you about that one shop?
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Old 02-10-2015, 06:27 PM   #8
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sorry for wasting time.....

Last edited by ben's plumbing; 02-10-2015 at 06:41 PM.
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Old 02-10-2015, 06:33 PM   #9
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Ben you can install them horizontal with support also. It's common for small tanks. Most run strapping around tank to the joist above.

All the support is for is when the bladder blows a hole.
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Old 02-10-2015, 06:40 PM   #10
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Quote:
Originally Posted by Ghostmaker View Post
Ben you can install them horizontal with support also. It's common for small tanks. Most run strapping around tank to the joist above.

All the support is for is when the bladder blows a hole.
yep i know it can be installed either way with proper support...what iam saying is the manufacture in it installation instructions say ..its designed to be installed in the verticial position......don't shoot the messenger

Last edited by ben's plumbing; 02-10-2015 at 06:53 PM.
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Old 02-10-2015, 07:01 PM   #11
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when i install any product . I was trained to install according to manufacture instructions cuppled with the local plumbing/ buliding codes which ever applies ...if that passed inspection by code ...which it did ..it would be void of warranty from manufacture....just saying...
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Old 02-10-2015, 08:43 PM   #12
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Thanks for your replies. I figured code would require some kind of support to secure it in place. With that cpvc holding it in place, it just a accidental bump from a disaster. Hopefully I get the same plumbing contractor who did the model home. I do see where the vertical install whould be smart so all the water can drain from the tank when not needed. I may look into buying a support and try to be there and give it to the plumber. Wouldn't want anyone to get fired for spending their bosses money
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Old 02-10-2015, 10:18 PM   #13
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Quote:
Originally Posted by Big Cat View Post
Thanks for your replies. I figured code would require some kind of support to secure it in place. With that cpvc holding it in place, it just a accidental bump from a disaster. Hopefully I get the same plumbing contractor who did the model home. I do see where the vertical install whould be smart so all the water can drain from the tank when not needed. I may look into buying a support and try to be there and give it to the plumber. Wouldn't want anyone to get fired for spending their bosses money
imho ..I would want that changed...I can't believe a plumber did that...:furiou s:
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Old 02-11-2015, 06:37 AM   #14
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Is that expansion tank tethered so it could not slide off of the top of the water heater?
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Old 02-11-2015, 06:56 AM   #15
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From what I have seen in the last few years this is a great job. I am fairly sure their is an elementary school here in town that has field trips where the kids go into people's homes an install water heaters.

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