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Section P3006 Sizing of Drain Pipe Offsets

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P3006.1 Vertical Offsets
An offset in a vertical drain, with a change of direction of 45 degrees (0.79 rad) or less from the vertical, shall be sized as a straight vertical drain.
P3006.2 Horizontal Offsets Above the Lowest Branch
A stack with an offset of more than 45 degrees (0.79 rad) from the vertical shall be sized as follows:
  1. The portion of the stack above the offset shall be sized as for a regular stack based on the total number of fixture units above the offset.
  2. The offset shall be sized as for a building drain in accordance with Table P3005.4.2.
  3. The portion of the stack below the offset shall be sized as for the offset or based on the total number of fixture units on the entire stack, whichever is larger.
P3006.3 Horizontal Offsets Below the Lowest Branch
In soil or waste stacks below the lowest horizontal branch, a change in diameter shall not be required if the offset is made at an angle not greater than 45 degrees (0.79 rad) from the vertical. If an offset greater than 45 degrees (0.79 rad) from the vertical is made, the offset and stack below it shall be sized as a building drain in accordance with Table P3005.4.2.

Related Code Sections

Section P3006 Sanitary Drainage, Sizing of Drain Pipe Offsets
An offset in a vertical drain, with a change of direction of 45 degrees (0.79 rad) or less from the vertical, shall be sized as a straight vertical ...
Section P3006 Sanitary Drainage, Sizing of Drain Pipe Offsets
An offset in a vertical drain, with a change of direction of 45 degrees (0.79 rad) or less from the vertical, shall be sized as a straight vertical ...
711.2 Sanitary Drainage, Horizontal Stack Offsets
711.2 shall not be required where the stack and its offset are one pipe size larger than required for a building drain [see Table 710.1(1)] and the entire ...