Closet Flange: Flush With Finished Floor, On On Top Of? - Plumbing - DIY Home Improvement | DIYChatroom


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Old 11-17-2008, 07:40 PM   #1
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Closet flange: flush with finished floor, on on top of?


Tauton Press "Code Check books" give me two different answers:
4th edition has the closet flange setting on TOP of finished floor
5th edition has the closet flange flush with the finished floor.
Has the UPC or IRC changed in that respect? Local inspectors are not calling back yet.

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Old 11-17-2008, 07:59 PM   #2
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Closet flange: flush with finished floor, on on top of?


Interesting question. I have installed them both ways. On new construction, the flange is mounted when the rough-in pipes (stacks and vents) are being installed. This puts them on the subfloor. Depending on the floors covering, ceramic or vinyl type tile, it may be even or above the "finished" floor. For reinstalling on a remodel, I like to keep the flange at least even with the new surface. I use extender rings if I need to elevate the original flange height.

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Old 11-18-2008, 09:16 PM   #3
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Closet flange: flush with finished floor, on on top of?


Thanks. that is what makes sense.
Local plumbing inspector responded and said flange should go on top of finished floor.
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Old 11-18-2008, 09:36 PM   #4
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Closet flange: flush with finished floor, on on top of?


In reality it doesn't matter. I normally go on top of finished floor, but as mentioned, in a new home they'll be tight to the subfloor or slab. The only difference it makes is how tall the wax ring needs to be.
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Old 11-20-2008, 07:43 PM   #5
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Closet flange: flush with finished floor, on on top of?


yeah, thektermit is right, i find it better to be on top of the finished floor, but watch out if tile is going down its alot easier to set flang 1/2" to 3/4" above floor
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