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Discussion Starter · #1 ·
Hello,

I have a quick question about the drawing that I am trying to confirm. This is for the city test. Everything below grade to my understanding is to be 4 inch. I am just trying to clarify that I am understanding that correctly. So floor sinks showers etc for the drawing should be 4 inch. I am originally from Nebraska where the rules in the small town are a little different than here in the city.

Marriage brings me here just in case itbdoeant make sense haha..

Thanks for any help.

Preston
 

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I Like Tater Tots
Plumber since 1979. 42 years and still rollin'
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I'm not from chicago so I cant answer that question but in my area, St. Louis MO we have a 4" minimum for soil (turd) pipes under the the slab but a 2" minimum otherwise.
 
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Here in Maryland you can have 2 in 3 inch or 4 in for residential Waste pipe under the slab. Depends on quantity of fixtures and size of fixture, main waste must always be 4 in. Making everything have to be 4 in under the floor does not make a lot of sense for showers, laundry drains Etc. I can't imagine that is correct, but again I am not familiar with code in that area.
 
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