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Old 12-25-2019, 08:58 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, 11:16 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 12-27-2019, 12:21 AM   #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, 07:00 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 12-29-2019, 12:15 AM   #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, 01:27 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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