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Old 12-25-2019, 07:58 PM   #11
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The inspector doesn’t know what he’s talking about. In my area that’s not uncommon. It’s going to be a lot easier just to do what he wants and not fight with him. If you are going to challenge him make sure you get your ducks in a row code wise. That said, it’s going to be a hell of a lot easier to just go with the flow.

There’s a good percentage of the members on here that would probably agree with me that I’m good plumber knows more than almost any given inspector about code.

I’m sorry I don’t have a better answer for you.
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Old 12-26-2019, 10:16 PM   #12
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This makes me glad we aren't required to use expansion tanks on open systems here.
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Old 12-26-2019, 11:21 PM   #13
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Quote:
Originally Posted by rwh View Post
This makes me glad we aren't required to use expansion tanks on open systems here.



if it's an open system why would you need an expansion tank?




















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Old 12-28-2019, 06:00 PM   #14
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Apparently its code to have expansion tanks in homes in some places.

QUOTE=skoronesa;1223618]
Quote:
Originally Posted by rwh View Post
This makes me glad we aren't required to use expansion tanks on open systems here.



if it's an open system why would you need an expansion tank?




















.[/QUOTE]
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Old 12-28-2019, 11:15 PM   #15
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Quote:
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Apparently its code to have expansion tanks in homes in some places.



When he said it was an open system I thought he meant an atmospherically vented steam heating system.




.


I have never heard the term "open system" being used to describe a domestic water system. I see now that he meant a domestic system with no checks. I understand why they might want an expansion tank if you're hooked to city water, could be pressure spikes.



Does a PRV act like a check valve? Maybe that's there reasoning.











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Old 12-29-2019, 12:27 AM   #16
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A PRV is not back flow prevention by any means, but by definition water can not flow from low pressure to high pressure. So, yeah, they should be treated as a “closed system” or a checked system.

Edit: I realized I might not be being clear.
In my area, we install an expansion tank on any system with a PRV. However, (harkens to my comment above) almost NO inspector will catch that one.
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Old 08-12-2020, 11:59 PM   #17
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We have made points to carrying paint and other stupid stuff to manipulate morons like this inspector. I pretty much heave had to write a book on these little tricks . Pretty much have something for everithing
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Old 08-18-2020, 11:00 PM   #18
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I got called on this for a small commercial job I did. Expansion tank to 3/4" copper female adapter. It was located in the ceiling without a ton of extra room. Normally, I use brass tee, 90, 6" nipple and short brass nipple out of the top of the tee.
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Old 08-25-2020, 09:55 AM   #19
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We service Durham, Raleigh, Chapel Hill area and all of our expansion tanks are hung on brass drop ear 90s, or copper females/brass couplings, or sideways with band iron to a wall (when using pex) I don't love the band iron method cause I think it looks sloppy, but that's just me......

This inspection correction is not one I have ever heard of, the most we ever hear of is not supporting it correctly. The "spirit" of the code (as we understand it) is to keep the stress of the weight of the tank off the fittings and pipe.

I have passed many inspections with the tank mounted vertically, nipple pointed straight down, straight shot to the heater nipple, this minimizes any stress on fittings and pipe, and looks nice in my opinion. And several passes using a drop ear to splice into the cold line in the crawl space if the heater location is too cramped, I don't love this one either, because then the tank is nipple up, and the weight of the water is contributing to bladder failure, but technically, it is not a reason for inspection failure. I also will sometimes build a shelf out of 2 x 4s, so I can use a drop ear, but with tank nipple down, if there is room near the heater location.

Never once had a problem with metals. In this area, those dielectric unions get plugged up quick, I hate them.

I would call the inspector and "fight" that one, respectfully of course.

Last month I had an inspector try to make me put a pan under a tankless in a sealed crawl space. I called bull, code states that is for tank style heaters, and besides that, replacement installs do not require drain piping from the pan to outside anyway.

So I asked the guy why would he subject the customer to more visits and me to more cost, if any leakage is just going to dump on the crawl floor anyway?

He agreed, and passed it.
That bladder is gonna fail no matter what or how you place it,about two yrs all you gonna get out of a properly sized and aired up expansion tank
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Old 08-25-2020, 11:53 AM   #20
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Quote:
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That bladder is gonna fail no matter what or how you place it,about two yrs all you gonna get out of a properly sized and aired up expansion tank
I have to disagree with you on that, if your expansion tanks are failing after 2 years you have other problems...I have installed expansion tanks on both closed heating systems and potable water systems still going strong for over 10 years, including in my own houses...
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