Horizontal offsets in soil stacks

[Scott Olsson]

Is a horizontal offset in a soil stack always prohibited? If so, why?

Thanks.

 

[Scott Olsson]

I'm asking because I don't see how I could connect an addition drain back to the building drain without introducing a large horizontal offset. I would not be venting with the waste stack (venting through the addition roof is not a problem).

 

[Sponsor]

 

[Reach4]

I'm asking because I don't see how I could connect an addition drain back to the building drain without introducing a large horizontal offset. I would not be venting with the waste stack (venting through the addition roof is not a problem).

Should not be a problem then. Use a long sweep for the vertical (coming down) to horizontal . I am not a plumber.

 

[Sylvan]

Not a problem use 1/8 bends for the offset (45 DEG fittings)

Every change of direction greater then 45 Deg you will need a clean out at the change of direction