To provide adequate drainage, what is the recommended distance or code (IRC) for the floor drain to be below the slab surface?

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Originally Posted by wendeladams

To provide adequate drainage, what is the recommended distance or code (IRC) for the floor drain to be below the slab surface?

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UPC 412.4 Floor Slope Floors shall be slopped to floor drains where drainage occurs on a regular or frequent basis.
In my area for a single family residence we position the top of the floor drain 1 inch under the pour. The exception to this would be if this were a commercial installation, such as a restaurant , where the contract calls for a larger sloped area.
Hope this helps. Tom

I don't know if I understand your question completely. But, drain inlet itself is flush with floor lever and pipe from the drain should be bellow the slab, slopped towards 4" drain at 1/4" per foot. Slab thickness varies: residential is 3 1/2" minimum and commercial is 6" and thicker.

The question's simple Milo, He wants to know how deep to position the floor drain.

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drain inlet itself is flush with floor lever

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Are you saying that there should be no slope to the drain inlet/ strainer? I'm sure you didn't mean that unless I've lost the meaning of drain inlet. You were referring to the top of the floor drain weren't you? Cheers Tom

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Originally Posted by wendeladams

To provide adequate drainage, what is the recommended distance or code (IRC) for the floor drain to be below the slab surface?

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Yep, Tom, he says "below the slab surface"? What ? The bottom of the trap ? Top of the drain pipe itself ? Question is a bit vague to me... Maybe he'll drop by again to with more specific question...

There is no mention of the floor slope so that's why I didn't know whether I was on the same track... Cheers... Milo