The plumbing can be below concrete, 12" should be fine, and then the waste line can drop into the existing line.

: I AM INSTALLING A BASEMENT BATHROOM AND WOULD

: LIKE TO KNOW THE PROPER WAY TO TAP INTO THE CLEANOUT.

: THE CLEANOUT LINE IS 3FT UNDER THE BASEMENT SLAB.

: THE HOUSE HAS A WALKOUT BASEMENT. THE BATHROOM WILL

: HAVE FOUR FIXTURES. I DON'T KNOW IF I HAVE TO DIG

: OUT A 3FT TRENCH TO THE TOILET ON ONE SIDE OF THE

: CLEANOUT LINE AND THE SAME ON THE OTHER SIDE FOR

: THE BATHTUB, OR IS IT POSSIBLE TO DIG A 1FT AND

: TAPER INTO THE VERTICAL CLEANOUT THAT IS COMING

: UP FROM THE 3FT DEPTH BY THE WATER METER. ANY HELP WOULD

: BE APPRECIATED.